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itmedia.co.jp

itmedia.co.jp is SSL secured

Free website and domain report on itmedia.co.jp

Last Updated: 10th November, 2020 Update Now
Overview

Snoop Summary for itmedia.co.jp

This is a free and comprehensive report about itmedia.co.jp. The domain itmedia.co.jp is currently hosted on a server located in Tokyo, Tokyo in Japan with the IP address 3.112.117.223, where JPY is the local currency and the local language is Japanese. Itmedia.co.jp is expected to earn an estimated $18,821 USD per day from advertising revenue. The sale of itmedia.co.jp would possibly be worth $13,739,042 USD. This figure is based on the daily revenue potential of the website over a 24 month period. Itmedia.co.jp is unbelievably popular with an estimated 2,021,357 daily unique visitors. This report was last updated 10th November, 2020.

About itmedia.co.jp

Site Preview: itmedia.co.jp itmedia.co.jp
Title: ITmedia
Description: テクノロジー関連のニュース及び速報を中心に、レビューや特集記事を掲載。
Keywords and Tags: blog, business, google 翻訳, it, itmedia, pc, popular, ƒgƒ“ƒ^[ƒvƒ‰ƒcƒy, ƒjƒ…[ƒx, ƒq[ƒ€, ƒ‚ƒoƒcƒ‹, ƒ‰ƒcƒtƒxƒ^ƒcƒ‹, おすすめ, きのう 何 食べ た, ねとら ぼ, アダルト, ジャニー 喜多川, ツイッター, ツイプロ, テイラー スウィフト, ポケモン, メルカリ, 川口 春奈, 意味
Related Terms:
Fav Icon:
Age:
Domain Created:
Domain Updated:
Domain Expires:
Review

Snoop Score

4/5 (Excellent!)

Valuation

$13,739,042 USD
Note: All valuation figures are estimates.

Popularity

Worldwide Sensation
Note: Popularity is estimated.

Rank, Reach and Authority

Alexa Rank: 1,291
Alexa Reach: 0.0461%
SEMrush Rank (US): 35,675
SEMrush Authority Score: 76
Moz Domain Authority: 92
Moz Page Authority: 55

Rank By Country

Country Alexa Rank
Hong Kong Flag Hong Kong 1,197
Japan Flag Japan 83
Taiwan, Province Of China Flag Taiwan, Province Of China 2,982

Organic vs Paid (Google Ads)

Organic Paid
Keywords: 187,336 0
Traffic: 63,864 0
Cost: $1,949 USD $0 USD
Traffic

Visitors

Daily Visitors: 2,021,357
Monthly Visitors: 61,523,740
Yearly Visitors: 737,795,305
Note: All visitors figures are estimates.

Visitors By Country

Country Visitors (Unique) Percentage
Hong Kong Flag Hong Kong Daily: 12,128
Monthly: 369,142
Yearly: 4,426,772 		0.6%
Japan Flag Japan Daily: 1,980,930
Monthly: 60,293,265
Yearly: 723,039,399 		98%
Other Daily: 16,171
Monthly: 492,190
Yearly: 5,902,362 		0.8%
Taiwan, Province Of China Flag Taiwan, Province Of China Daily: 12,128
Monthly: 369,142
Yearly: 4,426,772 		0.6%
Note: All visitors figures are estimates.
Revenue

Revenue

Daily Revenue: $18,821 USD
Monthly Revenue: $572,840 USD
Yearly Revenue: $6,869,516 USD
Note: All revenue figures are estimates.

Revenue By Country

Country Revenue Percentage
Hong Kong Flag Hong Kong Daily: $30 USD
Monthly: $908 USD
Yearly: $10,887 USD 		0.2%
Japan Flag Japan Daily: $18,771 USD
Monthly: $571,345 USD
Yearly: $6,851,592 USD 		99.7%
Other Daily: $0 USD
Monthly: $0 USD
Yearly: $0 USD 		<0.1%
Taiwan, Province Of China Flag Taiwan, Province Of China Daily: $19 USD
Monthly: $587 USD
Yearly: $7,037 USD 		0.1%
Note: All revenue figures are estimates.
SEO

Backlinks Analysis (SEMrush)

Backlinks: 48,849,256
Referring Domains: 48,007
Referring IPs: 49,268
Itmedia.co.jp has 48,849,256 backlinks according to SEMrush. 96% of these backlinks are "dofollow" (follow) links which allow the flow of link equity to pass through, which may improve itmedia.co.jp's search engine rankings. Other links are treated as 'hints' by search engines and may also pass link equity, depending on what search engines decide in each case.
100% of itmedia.co.jp's backlinks are text and image links, which are ideal for SEO. Other backlink types may be unrecognized or ignored by search engines.

Top New Follow Links

1
Source: https://b.hatena.ne.jp/
Target: https://www.itmedia.co.jp/news/articles/2003/12/news037.html
2
Source: https://b.hatena.ne.jp/
Target: https://www.itmedia.co.jp/news/articles/2003/19/news050.html
3
Source: https://b.hatena.ne.jp/
Target: https://www.itmedia.co.jp/news/articles/2003/19/news088.html
4
Source: https://b.hatena.ne.jp/
Target: https://www.itmedia.co.jp/news/articles/2003/11/news104.html
5
Source: https://b.hatena.ne.jp/
Target: https://www.itmedia.co.jp/news/articles/2002/18/news069.html

Top Ranking Keywords (US)

1
Keyword: ねとら ぼ
Ranked Page: https://nlab.itmedia.co.jp/
2
Keyword: ツイッター
Ranked Page: https://nlab.itmedia.co.jp/nl/articles/2003/29/news020.html
3
Keyword: google 翻訳
Ranked Page: https://www.itmedia.co.jp/news/articles/1906/17/news016.html
4
Keyword: アダルト
Ranked Page: https://www.itmedia.co.jp/news/articles/2003/25/news096.html
5
Keyword: itmedia
Ranked Page: https://www.itmedia.co.jp/

Domain Analysis

Value Length
Domain: itmedia.co.jp 13
Domain Name: itmedia 7
Extension (TLD): cojp 4

Page Speed Analysis

Average Load Time: 1.38 seconds
Load Time Comparison: Faster than 61% of sites

PageSpeed Insights

Avg. (All Categories) 59
Performance 63
Accessibility 74
Best Practices 64
SEO 83
Progressive Web App 11
0–49 (Fail) 50–89 (Average) 90–100 (Pass)
URL: https://www.itmedia.co.jp/
Updated: 10th November, 2020

0.99 seconds
First Contentful Paint (FCP)
75%
21%
4%

0.00 seconds
First Input Delay (FID)
99%
1%
0%

Simulate loading on desktop
63

Performance

Indicates how well the page is performing and highlights opportunities where performance may be improved for itmedia.co.jp. This includes details about optimizing page load times which can result in a better user experience.

Metrics

Total Blocking Time — 80 ms
The total blocking time is the sum of all time periods between First Contentful Paint and Time to Interactive (when task length exceeded 50ms).
Cumulative Layout Shift — 0.005
Cumulative Layout Shift is the measurement of visible elements collective movement within the viewport.
View Data

Other

Estimated Input Latency — 20 ms
The time taken for the page to respond to user input (during the busiest 5 second window of page load). Users are likely to perceive itmedia.co.jp as laggy when the latency is higher than 0.05 seconds.
Network Requests
Below is a list of network requests that were made during page load.
URL Start Time (Ms) End Time (Ms) Transfer Size (Bytes) Resource Size (Bytes) Status Code MIME Type Resource Type
http://itmedia.co.jp/
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Script
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Script
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Stylesheet
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Image
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Script
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Image
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Image
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Script
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Script
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Script
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Image
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https://pagead2.googlesyndication.com/pagead/gen_204?id=sodar2&v=219&t=2&li=gpt_2020110501&jk=1181437891545759&bg=!V1SlVHTNAAXuKKZk7lih8A0ZCVEHvAIAAAGDUgAAACxoAQcKAIYdZVPu3-uPQF9VV14ONBAGE5JMNCqWWmWi8LdI0MwjChmsC4mcsELiRQT1jHtT3O8G6Cu7kJUajWKZa19_i_TSG4cGy9dn0h-fwZAxr0DyKcnIIUiIPwgFcF1pewM1hfFN17AgM6G5BmeNEE2QD2jKPEm2zNvaTURHWckm47dDCkKfOph5-JkBz0AbxnFcahv8J9b7O1iGbIaG5OfQeWXJKiGKUWyiRL5rWnbQ_K2n-AfHsVHBNwm3E7L3aF_JHdW2z0dt2KCYcDbxf9YyE7gVHCUaI_EhFRkUPDSZQ0aJjKeZnnCXS5dwMHfC-KoZqhk6kazZPSfIk34CzSSfG3TpTq-IqzgGkzo13ejGnMDIedSZ-ZtwcS6zq0ploSYpQGVip-YTJMBUpRxSUkxMfxoW1Z9kZqefdGJIi6LT5LOD5aeuRLRj29HnjpDGiu6APmYCYlplcKIvh86Mg1sqHMV5uSpCUdH8Du0XxZdLFQSk3805Q0zi_sZ_HYeC5fqqUqc-nXRriUk970FETe1uPejXZtTP1TJsqXp9WAjXrL9cvV84RhqzEqgBmNloK1iceAvqffY-wEC3L4VpyyV3p11LLNa_DWrcqN3bMM3BHhsWi6qND3neRaiWBMJBOK-nM4LSxxTZoj1DXh-0tQ6ZqzTIljp7Ru6ENdoLlluBBP71D44mJ6xcIi605gAX6EbQ7PnHIzy7PCMbC3s3_lT-2EuefMw9dwg0jvQTMVRvwV332iwTmUmVRF-8zuSkLjeM9DT87lz0DRNY9wicgOjsVtwlHt49QCiP858
11750.046999892
11769.86999996
1005
0
204
image/gif
Image
Network Round Trip Times — 0 ms
High Network RTT (Round Trip Times) can have a large impact on performance. Providing servers geographically closer to the user could improve performance.
Server Backend Latencies — 0 ms
High server latencies indicate the server is overloaded or has a poor backend performance.
Tasks
Below is a list of the top-level main thread tasks that executed during page load.
Start Time (Ms) End Time (Ms)
1599.163
13.303
1613.62
11.116
1626.872
8.317
2309.373
11.385
2325.595
64.239
2442.389
32.901
2476.951
10.32
2835.854
7.385
3159.525
21.25
3183.042
8.083
3192.19
33.364
3255.232
22.61
3278.717
8.48
3288.861
17.766
3342.841
30.172
3373.913
5.963
3438.018
35.582
3863.374
33.563
4529.427
64.7
6332.842
17.301
6695.617
17.373
6866.221
5.954
6872.193
16.85
7070.269
20.141
7271.489
5.381
7552.153
8.266
7696.48
6.481
7934.666
11.771
7948.77
9.698
7965.155
6.016
7992.021
7.401
8009.674
49.686
8139.551
5.076
8997.823
5.791
9003.627
8.148
9013.464
8.754
9174.104
5.792
9186.357
37.362
9223.961
8.179
9232.221
267.938
9500.187
5.938
9511.109
7.198
9527.11
7.094
9534.224
19.938
9555.355
8.615
9564.083
8.241
9573.306
8.76
9582.125
7.663
9591.984
11.777
9604.612
22.595
9627.228
7.107
9640.893
13.765
9659.939
21.984
9682.514
14.404
9696.949
24.155
9721.146
25.572
9746.798
35.512
9782.438
15.299
9798.826
13.785
9815.2
10.887
9838.842
23.631
9862.639
14.646
9878.587
8.183
9886.836
6.897
9894.237
7.158
9901.557
6.744
9908.855
6.983
9917.667
8.764
9932.8
51.347
9984.228
10.499
9995.139
7.738
10008.122
8.93
10030.853
102.788
10133.944
30.561
10165.474
15.69
10184.656
5.663
10197.091
51.806
10255.603
10.058
10265.979
12.671
10278.761
28.123
10311.343
9.564
10337.192
8.761
10354.645
16.123
10375.559
5.324
10388.108
5.782
10408.263
5.37
10413.65
55.785
10469.612
95.585
10580.758
50.36
10634.33
10.165
10645.026
9.571
10656.09
8.791
10669.624
9.953
10690.227
54.441
10746.934
9.725
10757.167
10.914
10768.11
9.933
10778.069
10.181
10795.261
33.674
10831.354
12.155
10843.533
83.404
10927.467
43.795
10975.908
13.919
10989.887
5.532
10995.44
8.378
11003.842
17.46
11029.432
13.983
11053.084
14.833
11076.266
16.051
11092.766
12.718
11106.584
11.371
11120.438
67.976
11197.776
6.697
11206.88
5.547
11212.468
6.888
11221.936
6.301
11236.063
21.864
11259.082
12.229
11272.039
12.069
11294.42
5.717
11316.744
28.846
11345.656
17.178
11364.06
18.367
11384.812
12.02
11397.989
11.778
11410.145
11.658
11435.909
14.782
11453.124
7.826
11486.921
12.842
11520.284
5.443
11534.242
7.937
11542.298
5.137
11558.369
11.84
11583.607
14.55
11598.192
11.666
11609.874
5.279
11648.608
14.496
11668.156
36.424
11705.426
9.683
11735.87
14.499
11751.328
12.156
11765.04
12.433
Diagnostics
Below is a collection of useful page vitals.
View Data
Metrics
Below is a collection of metrics.
View Data

Opportunities

Defer offscreen images — Potential savings of 7 KiB
Time to Interactive can be slowed down by resources on the page. Itmedia.co.jp should consider lazy-loading offscreen and hidden images.
URL Resource Size (Bytes) Potential Savings (Bytes)
https://image.itmedia.co.jp/images/top/spritesource.png
7512
7512
Minify CSS — Potential savings of 3 KiB
Cascading Style Sheets (CSS) files can contribute to network payload sizes. Itmedia.co.jp should consider minifying CSS files.
URL Transfer Size (Bytes) Potential Savings (Bytes)
https://www.google.com/cse/static/element/83175b7bfe796f29/default+ja.css
9611
2929
Minify JavaScript — Potential savings of 33 KiB
JavaScript (JS) files can contribute to network payload sizes and increase script parse times. Itmedia.co.jp should consider minifying JS files.
URL Transfer Size (Bytes) Potential Savings (Bytes)
https://api.popin.cc/popin_discovery5-min.js
42134
18784
https://www.googletagmanager.com/gtm.js?id=GTM-W3CLTQN
47589
6466
https://www.itmedia.co.jp/js/base.js?201906041205
19566
5471
https://b.st-hatena.com/js/bookmark_button.js
11260
3369
Remove unused CSS
Dead and/or unused rules in Style Sheets (CSS) can contribute to network payload sizes. Itmedia.co.jp should consider removing dead rules from style sheets and deferring the loading of CSS not used for above-the-fold content.
Enable text compression — Potential savings of 9 KiB
Text-based resources should be served with compression, such as gzip, deflate or brotli.
URL Transfer Size (Bytes) Potential Savings (Bytes)
https://dlv.itmedia.jp/adsv/v1?posall=20ISALR&oe=shift_jis&nurl=https%3A//www.itmedia.co.jp/&fp=root%2FITmedia%2Ftop&word=%2CIT%2C%E3%83%8B%E3%83%A5%E3%83%BC%E3%82%B9%2C%E3%82%A8%E3%83%B3%E3%82%BF%E3%83%BC%E3%83%97%E3%83%A9%E3%82%A4%E3%82%BA%2C%E3%83%A2%E3%83%90%E3%82%A4%E3%83%AB%2C%E3%83%A9%E3%82%A4%E3%83%95%E3%82%B9%E3%82%BF%E3%82%A4%E3%83%AB%2CPC%2C%E3%82%B2%E3%83%BC%E3%83%A0%2Cblog&rnd=1605014897063&composite=1605014891223&ref=&x-cxsegids=&t=js
7679
5928
https://dlv.itmedia.jp/adsv/v1?posall=4ISTCPB&oe=shift_jis&nurl=https%3A//www.itmedia.co.jp/&fp=root%2FITmedia%2Ftop&word=%2CIT%2C%E3%83%8B%E3%83%A5%E3%83%BC%E3%82%B9%2C%E3%82%A8%E3%83%B3%E3%82%BF%E3%83%BC%E3%83%97%E3%83%A9%E3%82%A4%E3%82%BA%2C%E3%83%A2%E3%83%90%E3%82%A4%E3%83%AB%2C%E3%83%A9%E3%82%A4%E3%83%95%E3%82%B9%E3%82%BF%E3%82%A4%E3%83%AB%2CPC%2C%E3%82%B2%E3%83%BC%E3%83%A0%2Cblog&rnd=1605014895269&composite=1605014891223&ref=&x-cxsegids=&t=js
3997
2876
Preconnect to required origins
Resource hints, such as 'preconnect' or 'dns-prefetch', may assist in establishing early connections to important third-party origins.
Preload key requests
Key requests can be preloaded by using '<link rel=preload>'. Itmedia.co.jp should consider using '<link rel=preload>' to prioritize fetching resources that are currently requested later in page load.
Use video formats for animated content
Large GIFs are inefficient for delivering animated content. It is recommended to use MPEG4/WebM videos for animations and PNG/WebP for static images instead of GIF.
Remove duplicate modules in JavaScript bundles — Potential savings of 8 KiB
Ensure that no duplicate JavaScript modules from bundles exist to reduce bytes consumed by network activity.
Source Transfer Size (Bytes) Potential Savings (Bytes)
Other
5172
src/url.js
1760
src/service.js
1271
Avoid serving legacy JavaScript to modern browsers — Potential savings of 35 KiB
Polyfills and transforms enable legacy browsers to use new JavaScript features. For bundled JavaScript it is recommended to adopt a modern script deployment strategy using module/nomodule feature detection. This will reduce the amount of code shipped to modern browsers.
URL Potential Savings (Bytes)
https://connect.facebook.net/signals/config/185005748502834?v=2.9.27&r=stable
12157
https://apis.google.com/js/plusone.js
9150
https://apis.google.com/_/scs/apps-static/_/js/k=oz.gapi.en_US.0_afc8ibZR4.O/m=plusone/rt=j/sv=1/d=1/ed=1/am=wQE/rs=AGLTcCOPV8Bttuu5r6907bIMhw8f2tfAew/cb=gapi.loaded_0
7851
https://cs.nakanohito.jp/b3/bi.js
7026
https://connect.facebook.net/en_US/fbevents.js
44

Diagnostics

Avoids enormous network payloads — Total size was 2,100 KiB
Large network payloads can cost users money and are linked to long load times.
URL Transfer Size (Bytes)
https://img.itmedia.jp/so/images/sa/b/286/293866/300919749/Billboard_20201102_02.jpg
100823
https://securepubads.g.doubleclick.net/gpt/pubads_impl_2020110501.js?21068478
100729
https://www.google.com/cse/static/element/83175b7bfe796f29/cse_element__ja.js?usqp=CAI%3D
90344
https://connect.facebook.net/signals/config/185005748502834?v=2.9.27&r=stable
71190
https://cse.google.com/adsense/search/async-ads.js
68237
https://connect.facebook.net/ja_JP/sdk.js?hash=3505d47c0be0c5df3446fb46042ceeaf&ua=modern_es6
61108
https://cdn.ampproject.org/rtv/012010270040000/amp4ads-v0.js
58331
https://apis.google.com/_/scs/apps-static/_/js/k=oz.gapi.en_US.0_afc8ibZR4.O/m=plusone/rt=j/sv=1/d=1/ed=1/am=wQE/rs=AGLTcCOPV8Bttuu5r6907bIMhw8f2tfAew/cb=gapi.loaded_0
50107
https://img.itmedia.jp/so/images/sa/b/286/293866/300919750/Rectangle_20201102_01.jpg
49502
https://www.googletagmanager.com/gtm.js?id=GTM-W3CLTQN
47589
Avoid chaining critical requests — 41 chains found
Below is a list of Critical Request Chains, which shows which resources are loaded with a high priority. Itmedia.co.jp should consider reducing the length of chains, reducing the download size of resources, or deferring the download of unnecessary resources to improve page load.
User Timing marks and measures — 11 user timings
Make use of the User Timing API to measure an app's real-world performance during key user experiences.
Name Type Start Time (Ms) Duration (Ms)
gpt-tag-load
Mark
10050.705
gpt-first-ad-request
Mark
10105.939
gpt-first-ad-render
Mark
10438.246
is
Mark
10679.926
dr
Mark
10686.088
ol
Mark
10686.307
visible
Mark
10701.279
ofv
Mark
10701.316
mbv
Mark
10714.98
e_is
Mark
10715.312
pc
Mark
10968.622
JavaScript execution time — 1.3 s
JavaScript (JS) execution time can be lowered by reducing the time required for parsing, compiling and executing JS. Delivering smaller JS payloads may help with this.
URL Total CPU Time (Ms) Script Evaluation (Ms) Script Parse (Ms)
https://www.itmedia.co.jp/
502.982
69.961
8.788
Unattributable
406.774
2.69
0.126
https://securepubads.g.doubleclick.net/gpt/pubads_impl_2020110501.js?21068478
251.226
103.18
28.515
https://tpc.googlesyndication.com/sodar/sodar2/219/runner.html
236.293
224.755
2.198
https://connect.facebook.net/ja_JP/sdk.js?hash=3505d47c0be0c5df3446fb46042ceeaf&ua=modern_es6
230.275
162.992
13.469
https://platform.twitter.com/widgets.js
200.17
141.039
11.817
https://cdn.ampproject.org/rtv/012010270040000/amp4ads-v0.js
195.497
120.922
5.904
https://scdn.cxense.com/cx.js
173.222
111.007
25.578
https://www.google.com/cse/static/element/83175b7bfe796f29/cse_element__ja.js?usqp=CAI%3D
82.51
46.143
23.588
https://www.googletagmanager.com/gtm.js?id=GTM-W3CLTQN
71.775
56.318
7.381
https://platform.twitter.com/widgets/tweet_button.96fd96193cc66c3e11d4c5e4c7c7ec97.ja.html
63.687
15.529
8.232
https://ajax.googleapis.com/ajax/libs/jquery/1.6.4/jquery.min.js
63.387
27.621
2.84
https://www.google-analytics.com/analytics.js
52.48
43.296
4.36
Keep request counts low and transfer sizes small — 213 requests • 2,100 KiB
It is advised to add a budgets.json file in order to set budgets for the quantity and size of page resources.
Resource Type Requests Transfer Size (Bytes)
Total
213
2150731
Script
89
1130643
Image
59
504219
Document
24
400249
Stylesheet
22
52075
Other
17
40154
Font
2
23391
Media
0
0
Third-party
165
1966914
Minimize third-party usage — Third-party code blocked the main thread for 50 ms
It is advised to either limit, remove or delay the loading of redundant third-party code which may be significantly impacting load performance.
Third-Party Transfer Size (Bytes) Main-Thread Blocking Time (Ms)
SHOW DETAILS
444836
51.409
SHOW DETAILS
250763
0
SHOW DETAILS
223604
0
SHOW DETAILS
120156
0
SHOW DETAILS
115005
0
SHOW DETAILS
86698
0
SHOW DETAILS
82976
0
SHOW DETAILS
49618
0
SHOW DETAILS
32934
0
SHOW DETAILS
25193
0
SHOW DETAILS
20131
0
SHOW DETAILS
14359
0
SHOW DETAILS
1680
0
Largest Contentful Paint element — 1 element found
The element which was identified as the Largest Contentful Paint.
Element
img
Avoid large layout shifts — 5 elements found
Below is a list of all DOM elements that contribute to the CLS of the page.
Element CLS Contribution
img
0.0017026351514229
Special - PR - スマホで「G-SHOCK」をカッコよく撮る方法　新「MT-G」の機能美を堪能 目を見張る高成長、従業員100人未満「U100企業…
0.0011815256050783
目を見張る高成長、従業員100人未満「U100企業」が伸びる理由をプロが熱弁
0.0010030017442929
スマホで「G-SHOCK」をカッコよく撮る方法　新「MT-G」の機能美を堪能
0.00041632930736026
携帯電話約8000万台分から人の動きを把握　競合や顧客を分析するツールの正体 New!
0.00036358813230619
Uses passive listeners to improve scrolling performance
Improve the page's scroll performance by marking touch and wheel event listeners as 'passive'.
Avoid long main-thread tasks — 5 long tasks found
Below is a list of the longest tasks on the main thread, which is useful when identifying the worst input delay contributors.
URL Start Time (Ms) Duration (Ms)
https://www.itmedia.co.jp/js/itmid/smartPhoneHeadLink.js
2830
134
Unattributable
277
83
Unattributable
225
52
https://securepubads.g.doubleclick.net/gpt/pubads_impl_2020110501.js?21068478
4110
51
https://www.google.com/cse/static/element/83175b7bfe796f29/cse_element__ja.js?usqp=CAI%3D
2630
50
Avoid non-composited animations
It is recommended to avoid non-composited animations which are often janky and increase CLS.
Avoids large JavaScript libraries with smaller alternatives — 0 large libraries found
It is recommended to work with smaller JavaScript libraries to reduce your bundle size and avoid poor performance.

Budgets

Performance budget
It is advised to keep the quantity and size of all network requests under the targets set by the provided performance budget.
Timing budget
It is advised to set a timing budget to monitor the performance of your site.

Metrics

First Contentful Paint — 1.6 s
The time taken for the first image or text on the page to be rendered.
Largest Contentful Paint — 2.0 s
The timing of the largest text or image that is painted.
Time to Interactive — 3.9 s
The time taken for the page to become fully interactive.

Other

First CPU Idle — 3.6 s
The time taken for the page's main thread to be quiet enough to handle input.
Max Potential First Input Delay — 130 ms
Users could experience a delay when interacting with the page.

Opportunities

Eliminate render-blocking resources — Potential savings of 580 ms
Resources, such as JavaScript and style sheets, can block the first paint of the page. Itmedia.co.jp should consider delivering critical JavaScript/style sheets (JS/CSS) inline and deferring all non-critical JS/CSS.
URL Transfer Size (Bytes) Potential Savings (Ms)
https://www.itmedia.co.jp/js/spv/movePC2SP.js?date=200721152649
4501
110
https://www.itmedia.co.jp/css/base.css?201912041620
5064
110
https://www.itmedia.co.jp/css/ad.css?202003131035
1484
150
https://www.itmedia.co.jp/css/top.css?201104011055
455
150
https://www.itmedia.co.jp/css/top/base.css?201810161549
4107
150
https://www.itmedia.co.jp/css/top/ad.css?202010081719
1325
150
https://www.itmedia.co.jp/css/top/top.css?201406191729
373
150
https://ajax.googleapis.com/ajax/libs/jquery/1.6.4/jquery.min.js
32934
390
https://fc.itmedia.co.jp/fpcookie?site_id=itm_
613
230
https://www.itmedia.co.jp/js/scAccount.js
567
70
https://www.itmedia.co.jp/js/dlvRequest.js
3247
70
https://www.itmedia.co.jp/js/scRequest.js
2748
70
https://scdn.cxense.com/cx.js
25225
110
https://www.itmedia.co.jp/js/dlvRequest_cx.js?201711221648
2072
70
https://www.itmedia.co.jp/js/base.js?201906041205
19566
190
https://www.itmedia.co.jp/js/ad.js?201302061956
2000
70
https://www.itmedia.co.jp/js/top.js?201010281942
471
70
https://tr.api.itmedia.jp/v1.js
285
230
https://www.itmedia.co.jp/js/lib/cx_v2.js?202006301534
8018
110
https://www.itmedia.co.jp/css/gnavi.css?date=202001281043
4210
70
Properly size images — Potential savings of 171 KiB
Images can slow down the page's load time. Itmedia.co.jp should consider serving more appropriate-sized images.
URL Resource Size (Bytes) Potential Savings (Bytes)
https://img.itmedia.jp/so/images/sa/b/286/293870/300923074/A.jpg
42946
38174
https://img.itmedia.jp/so/images/sa/b/286/293867/300920363/240_icon01.jpg
34765
30902
https://img.itmedia.jp/so/images/sa/b/286/293868/300921554/ts0153_mtgb2k240_02.jpg
28704
25515
https://img.itmedia.jp/so/images/sa/b/286/293870/300922889/240B_Sky2.jpg
17274
15355
https://img.itmedia.jp/so/images/sa/b/286/293869/300921932/240A_sky1.jpg
15507
13784
https://img.itmedia.jp/so/images/sa/b/286/293870/300922894/240B_Sky2.jpg
17274
12956
https://img.itmedia.jp/so/images/sa/b/286/293868/300921842/f4h32087h.jpg
9125
8111
https://img.itmedia.jp/so/images/sa/b/286/293869/300921931/240B_sky1.jpg
10554
7916
https://img.itmedia.jp/so/images/sa/b/286/293868/300921840/f4h32087h.jpg
9125
6844
https://img.itmedia.jp/so/images/sa/b/286/293867/300920259/2401801.jpg
6511
5788
https://img.itmedia.jp/so/images/sa/b/286/293870/300923159/yuudou240.jpg
5684
5052
https://img.itmedia.jp/so/images/sa/b/286/293870/300923163/yuudou240.jpg
5684
4263
Remove unused JavaScript — Potential savings of 388 KiB
It is advised to remove unused JavaScript in order to reduce bytes consumed by network activity.
URL Transfer Size (Bytes) Potential Savings (Bytes)
https://cse.google.com/adsense/search/async-ads.js
68237
57868
https://connect.facebook.net/signals/config/185005748502834?v=2.9.27&r=stable
71190
53293
https://securepubads.g.doubleclick.net/gpt/pubads_impl_2020110501.js?21068478
100729
47681
https://www.google.com/cse/static/element/83175b7bfe796f29/cse_element__ja.js?usqp=CAI%3D
90344
46628
https://platform.twitter.com/widgets/tweet_button.96fd96193cc66c3e11d4c5e4c7c7ec97.ja.html
68632
35778
https://connect.facebook.net/ja_JP/sdk.js?hash=3505d47c0be0c5df3446fb46042ceeaf&ua=modern_es6
61108
35627
https://api.popin.cc/popin_discovery5-min.js
42134
35163
https://apis.google.com/_/scs/apps-static/_/js/k=oz.gapi.en_US.0_afc8ibZR4.O/m=plusone/rt=j/sv=1/d=1/ed=1/am=wQE/rs=AGLTcCOPV8Bttuu5r6907bIMhw8f2tfAew/cb=gapi.loaded_0
50107
33046
https://cdn.ampproject.org/rtv/012010270040000/amp4ads-v0.js
58331
29630
https://ajax.googleapis.com/ajax/libs/jquery/1.6.4/jquery.min.js
32934
22633
Efficiently encode images — Potential savings of 88 KiB
Unoptimized images can consume more cellular data than what is necessary.
URL Resource Size (Bytes) Potential Savings (Bytes)
https://img.itmedia.jp/so/images/sa/b/286/293870/300923074/A.jpg
42946
27105
https://img.itmedia.jp/so/images/sa/b/286/293867/300920363/240_icon01.jpg
34765
22493
https://img.itmedia.jp/so/images/sa/b/286/293866/300919749/Billboard_20201102_02.jpg
100510
17015
https://img.itmedia.jp/so/images/sa/b/286/293867/300920254/itmedia-giant-02.jpg
15315
9886
https://img.itmedia.jp/so/images/sa/b/286/293866/300919750/Rectangle_20201102_01.jpg
49191
7747
https://img.itmedia.jp/so/images/sa/b/286/293857/300910570/itmedia_fg2448.jpg
9844
5587
Serve images in next-gen formats — Potential savings of 177 KiB
Image formats like PNG and JPEG have poor compression when compared to other next-gen formats, such as JPEG 200, JPEG XR and WebP.
URL Resource Size (Bytes) Potential Savings (Bytes)
https://img.itmedia.jp/so/images/sa/b/286/293866/300919749/Billboard_20201102_02.jpg
100510
54354
https://img.itmedia.jp/so/images/sa/b/286/293870/300923074/A.jpg
42946
33496
https://img.itmedia.jp/so/images/sa/b/286/293867/300920363/240_icon01.jpg
34765
29099
https://img.itmedia.jp/so/images/sa/b/286/293866/300919750/Rectangle_20201102_01.jpg
49191
23969
https://img.itmedia.jp/so/images/sa/b/286/293867/300920254/itmedia-giant-02.jpg
15315
11831
https://tpc.googlesyndication.com/simgad/8613270213149924972/2076313506083323656
32856
11480
https://img.itmedia.jp/so/images/sa/b/286/293870/300922894/240B_Sky2.jpg
17274
8456
https://img.itmedia.jp/so/images/sa/b/286/293870/300922889/240B_Sky2.jpg
17274
8456
Avoid multiple page redirects — Potential savings of 380 ms
Redirects can cause additional delays before the page can begin loading. Itmedia.co.jp should avoid multiple or unnecessary page redirects.
URL Time Spent (Ms)
http://itmedia.co.jp/
190
http://www.itmedia.co.jp/
190
https://www.itmedia.co.jp/
0

Diagnostics

Minimize main-thread work — 3.4 s
Main-thread work timing can be lowered by reducing the time required for parsing, compiling and executing JS. Delivering smaller JS payloads may help with this.
Category Time Spent (Ms)
Script Evaluation
1597.38
Other
557.67799999999
Style & Layout
452.923
Script Parsing & Compilation
271.7
Rendering
202.141
Garbage Collection
172.107
Parse HTML & CSS
109.712

Metrics

Speed Index — 5.2 s
The time taken for the page contents to be visibly populated.

Other

First Meaningful Paint — 1.7 s
The time taken for the primary content of the page to be rendered.

Opportunities

Reduce initial server response time — Root document took 830 ms
It is advised to keep the server response time short for the main document, because all other requests depend on it.
URL Time Spent (Ms)
https://www.itmedia.co.jp/
829.535

Diagnostics

Serve static assets with an efficient cache policy — 57 resources found
Itmedia.co.jp can speed up repeat visits by increasing the cache lifetime, which is essentially how long before a cached copy expires.
URL Cache TTL (Ms) Transfer Size (Bytes)
https://securepubads.g.doubleclick.net/pagead/adview?ai=C_bIBcpWqX5DTN4qmngTgmpioCLDxnohg8ZbBnN4Mq-ffg5IOEAEg4ZG0KmDJlvKKtKTYD6AB97m9ywPIAQmpAmUBXw2LK7Y-4AIAqAMByAMKqgTXAU_Qdn8WlOWJRCm55c98UZkd9YywfAFjHHiqsW9-VGpCVdrUpsbFSi62vdpsOrw6ZRjnnjXJc7JI78VD7T1zOU8Szs55DVEjI4a7uVDJt3HAZcM9BdPBf-_paSRjPr9ozMDgDeGBpCYvb8UgLjAIF-vjsYyIZpwVounJdcM0Xo5suw-h7NL0XUvUS4xUwY2-Gsym8ELNCe_1SzdDoIXXCmltr6OE93uDVMPySX_PN-CqR3qnBGaKas0OyUlvo-pYpG2rUHGLl7TivYvhFhzoEoZIIFdxlgqJwAS1zdjj_QHgBAGSBQQIBBgBkgUECAUYBKAGLoAH8cXCNKgH1ckbqAfw2RuoB_LZG6gHjs4bqAeT2BuoB7oGqAfulrECqAemvhuoB-zVG9gHAPIHBBDNogrSCAcIgGEQARgdgAoDyAsBsgwUcHViLTE3NTc3NDczMTI2Mjk5NDfCDAIIAdgTDIgUBA&sigh=flDsq3-H0co&template_id=484&tpd=AGWhJms_w8MvpuqmVZHFQXgXu5OncKB0B2DiQiGDnBgrij51qg
0
641
https://fc.itmedia.co.jp/fpcookie?site_id=itm_
0
613
https://in.treasuredata.com/js/v3/event/cx_segments/pageviews?api_key=10074%2Ff8a32fad2e11b3499ae935d855ff3bb51cbc592c&modified=1605014898529&data=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%2BWQiOaDheWgseODneODvOOCv%2BODq%2BOAjElUbWVkaWHjgI1Ib21lIiwidGRfZGVzY3JpcHRpb24iOiLjg4bjgq%2Fjg47jg63jgrjjg7zplqLpgKPjga7jg4vjg6Xjg7zjgrnlj4rjgbPpgJ%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&callback=TreasureJSONPCallback0
0
515
https://scomcluster.cxense.com/Repo/rep.gif?ver=1&typ=pgv&rnd=khc0fc248mu7m4e8&acc=0&sid=1139581027321622182&loc=https%3A%2F%2Fwww.itmedia.co.jp%2F&gol=&pgn=&new=0&arf=0&ltm=1605014891212&ref=&tzo=480&res=800x600&dpr=1&col=24&jav=0&bln=en-US&chs=Shift_JIS&cks=khc0fcmv5004117o&ckp=khc0fc29ozu8kskz&glb=&wsz=1350x940&cp_u_itm_vid=itm_ft4N7EK5JeefoMMZrI32&cp_u_itm_ubid=&cp_itm_window_size_w_10=1350&cp_itm_window_size_w_50=1350&cp_itm_window_size_h_10=940&cp_itm_window_size_h_50=950&cp_itm_adpath=ITmedia%2Ftop&cp_itm_adpath_2=ITmedia&cp_itm_adpath_3=top&cp_itm_article_page=single&cp_newusersession=true&fls=0&flv=&cst=3s8e6g72ndo6j2c6l86bo4pwl7
0
469
https://in.treasuredata.com/postback/v3/event/logly/sync?td_write_key=8151/6ea1714a3a4eaf6a07bd7e67d51a423827d37091&td_global_id=td_global_id&td_ip=td_ip&td_ua=td_ua&account=aws-us-10074&cid=DbMNF5Iu_jjdfw7c4-mv4aShb30
0
421
https://cx.api.itmedia.co.jp/v1.js
0
341
https://tr.api.itmedia.jp/v1.js
0
285
https://b92.yahoo.co.jp/js/s_retargeting.js
600000
3550
https://www.itmedia.co.jp/json/top/rss_artRank2.json
900000
1258
https://connect.facebook.net/signals/config/185005748502834?v=2.9.27&r=stable
1200000
71190
https://connect.facebook.net/en_US/fbevents.js
1200000
23700
https://connect.facebook.net/ja_JP/sdk.js
1200000
2681
https://platform.twitter.com/widgets.js
1800000
29293
https://www.google.com/cse/static/style/look/v4/default.css
3000000
1966
https://api.popin.cc/popin_discovery5-min.js
3600000
42134
https://scdn.cxense.com/cx.js
3600000
25225
https://scdn.cxense.com/cx.js
3600000
25225
https://scdn.cxense.com/cx.js
3600000
25225
https://api.popin.cc/td_js_sdk_171.js
3600000
13161
https://api.popin.cc/searchbox/itmedia.js
3600000
1966
https://www.google-analytics.com/analytics.js
7200000
19479
https://cs.nakanohito.jp/b3/bi.js
10800000
18768
https://b.st-hatena.com/js/bookmark_button.js
86400000
11260
https://tpc.googlesyndication.com/pagead/images/abg/en.png
86400000
3612
https://tpc.googlesyndication.com/pagead/images/abg/icon.png
86400000
997
https://img.itmedia.jp/so/images/sa/b/286/293866/300919749/Billboard_20201102_02.jpg
604800000
100823
https://img.itmedia.jp/so/images/sa/b/286/293866/300919750/Rectangle_20201102_01.jpg
604800000
49502
https://img.itmedia.jp/so/images/sa/b/286/293870/300923074/A.jpg
604800000
43257
https://img.itmedia.jp/so/images/sa/b/286/293867/300920363/240_icon01.jpg
604800000
35076
https://img.itmedia.jp/so/images/sa/b/286/293868/300921554/ts0153_mtgb2k240_02.jpg
604800000
29015
https://img.itmedia.jp/so/images/sa/b/286/293870/300922889/240B_Sky2.jpg
604800000
17585
https://img.itmedia.jp/so/images/sa/b/286/293870/300922894/240B_Sky2.jpg
604800000
17585
https://img.itmedia.jp/so/images/sa/b/286/293869/300921932/240A_sky1.jpg
604800000
15818
https://img.itmedia.jp/so/images/sa/b/286/293867/300920254/itmedia-giant-02.jpg
604800000
15626
https://img.itmedia.jp/so/images/sa/b/286/293869/300921931/240B_sky1.jpg
604800000
10865
https://img.itmedia.jp/so/images/sa/b/286/293857/300910570/itmedia_fg2448.jpg
604800000
10154
https://img.itmedia.jp/so/images/sa/b/286/293868/300921840/f4h32087h.jpg
604800000
9435
https://img.itmedia.jp/so/images/sa/b/286/293868/300921842/f4h32087h.jpg
604800000
9435
https://img.itmedia.jp/so/images/sa/b/286/293867/300920259/2401801.jpg
604800000
6821
https://img.itmedia.jp/so/images/sa/b/286/293870/300923159/yuudou240.jpg
604800000
5994
https://img.itmedia.jp/so/images/sa/b/286/293870/300923163/yuudou240.jpg
604800000
5994
https://image.itmedia.co.jp/images/top/spritesource.png
2592000000
8079
https://image.itmedia.co.jp/business/articles/2011/10/top_news120.jpg
2592000000
7311
https://image.itmedia.co.jp/enterprise/articles/2011/10/top_news013.jpg
2592000000
5180
https://image.itmedia.co.jp/mobile/articles/2011/10/top_news111.jpg
2592000000
4777
https://image.itmedia.co.jp/mobile/articles/2011/10/top_news121.jpg
2592000000
4610
https://image.itmedia.co.jp/pcuser/articles/2011/10/top_news099.jpg
2592000000
4053
https://image.itmedia.co.jp/mn/articles/2011/10/top_news030.jpg
2592000000
3937
https://image.itmedia.co.jp/mobile/articles/2011/10/top_news132.jpg
2592000000
3893
https://image.itmedia.co.jp/fav/articles/2011/10/top_news135.jpg
2592000000
3763
https://image.itmedia.co.jp/news/articles/2011/10/top_news123.jpg
2592000000
3582
https://image.itmedia.co.jp/news/articles/2011/10/top_news138.jpg
2592000000
3220
https://image.itmedia.co.jp/news/articles/2011/10/top_news140.jpg
2592000000
2960
https://image.itmedia.co.jp/images/logo/pcvheader_top.png
2592000000
2620
https://image.itmedia.co.jp/images/logo/170_itmedia_bgw.gif
2592000000
2169
https://image.itmedia.co.jp/images/top/colBoxITTicon.gif
2592000000
742
https://image.itmedia.co.jp/images/top/colBox_ulli.gif
2592000000
627
Avoid an excessive DOM size — 1,918 elements
A large DOM (Document Object Model) will increase memory usage, cause longer system calculations as well as costly layout reflows.
Statistic Element Value
Total DOM Elements
1,918
Maximum DOM Depth
SHOW DETAILS
25
Maximum Child Elements
SHOW DETAILS
100
Ensure text remains visible during webfont load
Make use of the font-display CSS feature, which will ensure text is user-visible while webfonts are loading.
URL Potential Savings (Ms)
https://fonts.gstatic.com/s/roboto/v20/KFOlCnqEu92Fr1MmWUlfBBc4AMP6lQ.woff2
4.1499999351799
https://fonts.gstatic.com/s/roboto/v20/KFOlCnqEu92Fr1MmSU5fBBc4AMP6lQ.woff2
2.7129999361932
Avoid `document.write()`
Avoid or limit the use of external scripts that are dynamically injected via 'document.write()' as users on slow connections will be delayed by tens of seconds.
URL Location
https://www.itmedia.co.jp/
line: 93
https://www.itmedia.co.jp/
line: 111
https://www.itmedia.co.jp/js/dlvRequest_cx.js?201711221648
line: 96
https://dlv.itmedia.jp/adsv/v1?posall=ITWL&oe=shift_jis&nurl=https%3A//www.itmedia.co.jp/&fp=root%2FITmedia%2Ftop&word=%2CIT%2C%E3%83%8B%E3%83%A5%E3%83%BC%E3%82%B9%2C%E3%82%A8%E3%83%B3%E3%82%BF%E3%83%BC%E3%83%97%E3%83%A9%E3%82%A4%E3%82%BA%2C%E3%83%A2%E3%83%90%E3%82%A4%E3%83%AB%2C%E3%83%A9%E3%82%A4%E3%83%95%E3%82%B9%E3%82%BF%E3%82%A4%E3%83%AB%2CPC%2C%E3%82%B2%E3%83%BC%E3%83%A0%2Cblog&rnd=1605014891928&composite=1605014891223&ref=&x-cxsegids=&t=js
line: 0
https://dlv.itmedia.jp/adsv/v1?posall=ITWL&oe=shift_jis&nurl=https%3A//www.itmedia.co.jp/&fp=root%2FITmedia%2Ftop&word=%2CIT%2C%E3%83%8B%E3%83%A5%E3%83%BC%E3%82%B9%2C%E3%82%A8%E3%83%B3%E3%82%BF%E3%83%BC%E3%83%97%E3%83%A9%E3%82%A4%E3%82%BA%2C%E3%83%A2%E3%83%90%E3%82%A4%E3%83%AB%2C%E3%83%A9%E3%82%A4%E3%83%95%E3%82%B9%E3%82%BF%E3%82%A4%E3%83%AB%2CPC%2C%E3%82%B2%E3%83%BC%E3%83%A0%2Cblog&rnd=1605014891928&composite=1605014891223&ref=&x-cxsegids=&t=js
line: 1
https://dlv.itmedia.jp/adsv/v1?posall=ITN&oe=shift_jis&nurl=https%3A//www.itmedia.co.jp/&fp=root%2FITmedia%2Ftop&word=%2CIT%2C%E3%83%8B%E3%83%A5%E3%83%BC%E3%82%B9%2C%E3%82%A8%E3%83%B3%E3%82%BF%E3%83%BC%E3%83%97%E3%83%A9%E3%82%A4%E3%82%BA%2C%E3%83%A2%E3%83%90%E3%82%A4%E3%83%AB%2C%E3%83%A9%E3%82%A4%E3%83%95%E3%82%B9%E3%82%BF%E3%82%A4%E3%83%AB%2CPC%2C%E3%82%B2%E3%83%BC%E3%83%A0%2Cblog&rnd=1605014892611&composite=1605014891223&ref=&x-cxsegids=&t=js
line: 0
https://dlv.itmedia.jp/adsv/v1?posall=2ISTLF&oe=shift_jis&nurl=https%3A//www.itmedia.co.jp/&fp=root%2FITmedia%2Ftop&word=%2CIT%2C%E3%83%8B%E3%83%A5%E3%83%BC%E3%82%B9%2C%E3%82%A8%E3%83%B3%E3%82%BF%E3%83%BC%E3%83%97%E3%83%A9%E3%82%A4%E3%82%BA%2C%E3%83%A2%E3%83%90%E3%82%A4%E3%83%AB%2C%E3%83%A9%E3%82%A4%E3%83%95%E3%82%B9%E3%82%BF%E3%82%A4%E3%83%AB%2CPC%2C%E3%82%B2%E3%83%BC%E3%83%A0%2Cblog&rnd=1605014893343&composite=1605014891223&ref=&x-cxsegids=&t=js
line: 0
https://dlv.itmedia.jp/adsv/v1?posall=2ISTLF&oe=shift_jis&nurl=https%3A//www.itmedia.co.jp/&fp=root%2FITmedia%2Ftop&word=%2CIT%2C%E3%83%8B%E3%83%A5%E3%83%BC%E3%82%B9%2C%E3%82%A8%E3%83%B3%E3%82%BF%E3%83%BC%E3%83%97%E3%83%A9%E3%82%A4%E3%82%BA%2C%E3%83%A2%E3%83%90%E3%82%A4%E3%83%AB%2C%E3%83%A9%E3%82%A4%E3%83%95%E3%82%B9%E3%82%BF%E3%82%A4%E3%83%AB%2CPC%2C%E3%82%B2%E3%83%BC%E3%83%A0%2Cblog&rnd=1605014893343&composite=1605014891223&ref=&x-cxsegids=&t=js
line: 1
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74

Accessibility

Indicates how accessible the page is and highlights opportunities where the page can be made more accessible to users of itmedia.co.jp. This includes details about various page attributes that can be optimized.

Navigation

`[accesskey]` values are unique
Access keys assist users with focusing on different parts of the page. Each access key should be unique for proper navigation.
The page contains a heading, skip link, or landmark region
It is advised to provide ways to bypass repetitive content, allowing users to navigate the page efficiently.
`[id]` attributes on active, focusable elements are unique
Ensure all focusable elements have a unique id value to allow them to be visible to users of assistive technologies, like a screen reader.
No element has a `[tabindex]` value greater than 0
Although technically valid, a tabindex value greater than 0 often creates frustrating experiences for users who rely on assistive technologies.

ARIA

`[aria-*]` attributes match their roles
Avoid mismatching 'aria-*' attributes and their 'role' value, as it invalidates the attribute.
`[aria-hidden="true"]` is not present on the document `<body>`
If aria-hidden=true is set on the document body, assistive technologies, like a screen reader will work inconsistently.
`[aria-hidden="true"]` elements do not contain focusable descendents
Interactive elements within an aria-hidden=true element are unavailable to users of assistive technologies, like a screen reader.
ARIA input fields have accessible names
Generic names are announced to users of assistive technologies, like a screen reader, when an input field does not have an accessible name specified.
`[role]`s have all required `[aria-*]` attributes
Some ARIA roles have required 'aria-*' attributes, which provide essential information about state and functionality.
Elements with an ARIA `[role]` that require children to contain a specific `[role]` have all required children.
Some ARIA parent roles cannot perform their intended functions if specific child roles are not used.
`[role]`s are contained by their required parent element
Some ARIA child roles cannot perform their intended functions if specific parent roles are not used.
`[role]` values are valid
All ARIA roles require valid values to perform their intended functions.
ARIA toggle fields have accessible names
Generic names are announced to users of assistive technologies, like a screen reader, when a toggle field does not have an accessible name specified.
`[aria-*]` attributes have valid values
ARIA attributes cannot be interpreted with invalid values when used by screen readers and other assistive technologies.
`[aria-*]` attributes are valid and not misspelled
ARIA attributes cannot be interpreted with invalid names when used by screen readers and other assistive technologies.
ARIA IDs are unique
Ensure all ARIA ID values are unique to prevent elements from being overlooked by assistive technologies, like a screen reader.

Names and labels

Buttons have an accessible name
Buttons become unusable as they are announced simply as "button" when the button does not have an accessible name, when used by screen readers and other assistive technologies.
Document has a `<title>` element
Search engines, screen reader users and other assistive technology users rely on the title to provide an overview of the page and to help determine if the page is relevant to their search.
No form fields have multiple labels
Having multiple labels for form fields can be confusing to assistive technologies, like a screen reader.
`<input type="image">` elements have `[alt]` text
Input buttons with alternative text assist screen readers and other assistive technology users to understand its purpose.
Form elements have associated labels
Screen readers and other assistive technologies rely on labels to properly announce form controls.
`<object>` elements have `[alt]` text
It is advised that alt text is used on '<object>' elements in order to provide meaning to screen reader and other assistive technology users, as these technologies are unable to translate non-text content.

Tables and lists

`<dl>`'s contain only properly-ordered `<dt>` and `<dd>` groups, `<script>`, `<template>` or `<div>` elements.
Screen readers and other assistive technologies may produce poor and inaccurate output when definition lists are not properly marked up.
Definition list items are wrapped in `<dl>` elements
In order for screen readers and other assistive technologies to properly announce definition list items ('<dt>' and '<dd>'), they must be wrapped in parent a '<dl>' element.
Presentational `<table>` elements avoid using `<th>`, `<caption>` or the `[summary]` attribute.
It is advised to not include data elements in tables which are used for layout purposes, as it may create confusion for screen reader and other assistive technology users.
Lists contain only `<li>` elements and script supporting elements (`<script>` and `<template>`).
Use proper list structure to aid screen readers and other assistive technologies.
List items (`<li>`) are contained within `<ul>` or `<ol>` parent elements
In order for screen readers to announce list items, ensure that list items ('<li>') are contained within parent '<ul>' or '<ol>' tags.
Cells in a `<table>` element that use the `[headers]` attribute refer to table cells within the same table.
Screen readers and other assistive technologies have features to make navigating tables easier. Ensure that '<td>' cells using the headers attribute only refer to other cells in the same table, to improve screen reader user experience.
`<th>` elements and elements with `[role="columnheader"/"rowheader"]` have data cells they describe.
Screen readers and other assistive technologies have features to make navigating tables easier. Ensure that table headers refer to some set of cells, to improve screen reader user experience.

Internationalization and localization

`<html>` element has a `[lang]` attribute
It is advised to provide a lang attribute so that screen readers and other assistive technologies are guaranteed to announce the page's text correctly. When not provided, the user's default language setting will be used which may cause inaccuracies.
`<html>` element has a valid value for its `[lang]` attribute
Specify a valid BCP 47 language in order to help screen readers and other assistive technologies announce text properly.
`[lang]` attributes have a valid value
Specify a valid BCP 47 language on elements in order to help screen readers and other assistive technologies announce text properly.

Best practices

The document does not use `<meta http-equiv="refresh">`
Pages that refresh automatically cause a poor user experience as focus is directed back to the top of the page unexpectedly.
`[user-scalable="no"]` is not used in the `<meta name="viewport">` element and the `[maximum-scale]` attribute is not less than 5.
For users with low vision who rely on screen magnification, ensure that zooming is not disabled.

Audio and video

`<video>` elements contain a `<track>` element with `[kind="captions"]`
Itmedia.co.jp may provide assistance to deaf or hearing-impaired users with captions on videos.
`<video>` elements contain a `<track>` element with `[kind="description"]`
Itmedia.co.jp may provide relevant information that dialogue cannot, by using audio descriptions.

Contrast

Background and foreground colors do not have a sufficient contrast ratio.
Many (if not most) users find low-contrast text difficult or impossible to read.
Failing Elements
新着記事
バックナンバー
キーワード
- PR -
- PR -
テーマ別
メディア別
from NEWS
from エンタープライズ|エグゼクティブ|マーケティング|TechTarget|キーマンズネット
from Fav-Log
from Mobile
from PC USER
from ビジネスオンライン
from TechFactory|MONOist|EE Times Japan|EDN Japan|スマートジャパン|＠IT
from オルタナティブ・ブログ|エンジニアライフ|マーケター通信
from ねとらぼ
- PR -
記事ランキング
HOTキーワード（ITmedia Keywords）
（ITmedia Keywords）

Names and labels

`<frame>` or `<iframe>` elements do not have a title
Screen reader users and other assistive technology users rely on frame titles to describe the contents of frames.
Failing Elements
iframe
Image elements do not have `[alt]` attributes
Provide short and descriptive alternative text where possible on informative elements.
Failing Elements
img
img
img
img
img
img
img
img
img
img
img
img
img
img
img
img
img
Links do not have a discernible name
In order to improve the navigation for screen reader and other assistive technology users, use link text that is unique, focusable and discernible.

Navigation

Heading elements are not in a sequentially-descending order
Properly order all headers and do not skip heading levels to better the navigation and readability for users of assistive technologies, like a screen reader.
Failing Elements
h5
h5
h5
h5
h5
h5

Manual Checks

The page has a logical tab order
The visual layout should be logical in its tab order and users cannot focus elements that are offscreen.
Interactive controls are keyboard focusable
Ensure that custom interactive controls are keyboard focusable and that a focus indicator is displayed.
Interactive elements indicate their purpose and state
Ensure that interactive elements (such as links and buttons) are distinguishable from non-interactive elements and that they indicate their state.
The user's focus is directed to new content added to the page
When new content (such as a dialogue) is added to the page, the user's focus should be directed to it.
User focus is not accidentally trapped in a region
Avoid focus being accidentally trapped when a user tabs in and out of controls or regions on page.
Custom controls have associated labels
Ensure that custom interactive controls have associated labels, which are provided by aria-label and aria-labelledby attributes.
Custom controls have ARIA roles
Ensure that all custom interactive controls have appropriate ARIA roles.
Visual order on the page follows DOM order
Ensure that the DOM order matches with the page's visual order, in order to improve navigation for screen readers and other assistive technologies.
Offscreen content is hidden from assistive technology
Ensure that offscreen content is hidden through the use of "display:none" styling or the aria-hidden attribute.
HTML5 landmark elements are used to improve navigation
Elements such as <main> and <nav> are recommended as they are used by screen readers and other assistive technologies to improve keyboard navigation.
64

Best Practices

Indicates the recommended, best practices currently in place on the page and highlights the best practices that itmedia.co.jp should incorporate. This includes practices such as protecting pages with HTTPS.

Audits

Links to cross-origin destinations are safe
Improve performance and prevent security vulnerabilities by adding rel="noopener" and rel="noreferrer" to external links.
Avoids requesting the geolocation permission on page load
When requesting a user's location, provide context or consider tying the request to a user action to avoid confusion and mistrust from users.
Avoids requesting the notification permission on page load
When requesting permission to send notifications, provide context or consider tying the request to a user action to avoid confusion and mistrust from users.

Audits

Allows users to paste into password fields
Ensure that password inputs may be pasted into to aid in the user's ability to use password managers and improve security.
Displays images with correct aspect ratio
Ensure that image display dimensions match their natural aspect ratio.
Serves images with appropriate resolution
For maximum image clarity, ensure images have natural dimensions and are proportional to the display size and pixel ratio.
Fonts with `font-display: optional` are preloaded
It is recommended that optional fonts are preloaded.

Audits

Properly defines charset
It is advised to declare a character encoding, optionally via a <meta> tag in the first 1024 bytes of the HTML or in the Content-Type HTTP response header.

Audits

Avoids Application Cache
Application cache is deprecated and is no longer recommended.
Detected JavaScript libraries
Below is a list of all front-end JavaScript libraries that were detected on the page.
Name Version
jQuery
1.6.4
core-js
3.0.0: pure
Avoids deprecated APIs
Avoid deprecated APIs which will eventually be removed the browser.
Page has valid source maps
Consider deploying source maps for added benefits such as the ability to debug while in production.
URL Map URL
https://scdn.cxense.com/cx.js
https://scdn.cxense.com/cx.js.map
https://scdn.cxense.com/cx.js
https://scdn.cxense.com/cx.js.map
https://scdn.cxense.com/cx.js
https://scdn.cxense.com/cx.js.map
https://cdn.ampproject.org/rtv/012010270040000/v0/amp-form-0.1.js
https://cdn.ampproject.org/rtv/012010270040000/v0/amp-form-0.1.js.map
https://cdn.ampproject.org/rtv/012010270040000/v0/amp-fit-text-0.1.js
https://cdn.ampproject.org/rtv/012010270040000/v0/amp-fit-text-0.1.js.map
https://cdn.ampproject.org/rtv/012010270040000/v0/amp-analytics-0.1.js
https://cdn.ampproject.org/rtv/012010270040000/v0/amp-analytics-0.1.js.map
https://cdn.ampproject.org/rtv/012010270040000/v0/amp-ad-exit-0.1.js
https://cdn.ampproject.org/rtv/012010270040000/v0/amp-ad-exit-0.1.js.map
https://cdn.ampproject.org/rtv/012010270040000/amp4ads-v0.js
https://cdn.ampproject.org/rtv/012010270040000/amp4ads-v0.js.map

Audits

Does not use HTTPS — 2 insecure requests found
Ensure that all pages are protected with HTTPS (including those that do not handle sensitive data) as HTTPS prevents tampering and passive listening on communications between the app and its users. Additionally, HTTPS is a prerequisite for HTTP/2 and many new web platform APIs.
Insecure URL
http://itmedia.co.jp/
http://www.itmedia.co.jp/
Includes front-end JavaScript libraries with known security vulnerabilities — 5 vulnerabilities detected
Ensure that the use of third-party scripts is minimal and that only trusted third-party scripts are used as some may contain known security vulnerabilities which may be exploited by attackers.
Library Version Vulnerability Count Highest Severity
SHOW DETAILS
5
Medium

Audits

Page lacks the HTML doctype, thus triggering quirks-mode
Ensure a doctype is specified to prevent the browser from switching to quirks-mode.

Audits

Registers an `unload` listener
The 'unload' event does not fire reliably, causing issues with browser optimizations such as the Back-Forward Cache. It is recommended that 'pagehide' or 'visibilitychange' events are used instead.
URL
SHOW DETAILS
SHOW DETAILS
SHOW DETAILS
Browser errors were logged to the console
Below is a list of all errors logged to the console, which indicate unresolved problems on the site.
URL Description
https://bs.nakanohito.jp/b3/
Failed to load resource: net::ERR_BLOCKED_BY_CLIENT.Inspector
https://www.itmedia.co.jp/
Refused to display 'https://www.facebook.com/login/?next=https%3A%2F%2Fwww.facebook.com%2Fplugins%2Flike.php%3Faction%3Dlike%26app_id%3D127564034422715%26channel%3Dhttps%253A%252F%252Fstaticxx.facebook.com%252Fx%252Fconnect%252Fxd_arbiter%252F%253Fversion%253D46%2523cb%253Df1241a9cf1c76a4%2526domain%253Dwww.itmedia.co.jp%2526origin%253Dhttps%25253A%25252F%25252Fwww.itmedia.co.jp%25252Ff175235651f7204%2526relation%253Dparent.parent%26container_width%3D107%26href%3Dhttps%253A%252F%252Fwww.itmedia.co.jp%252Fnews%252Farticles%252F2011%252F10%252Fnews123.html%26layout%3Dbutton_count%26locale%3Dja_JP%26sdk%3Djoey%26share%3Dfalse%26show_faces%3Dfalse' in a frame because it set 'X-Frame-Options' to 'deny'.
https://www.itmedia.co.jp/
Refused to display 'https://www.facebook.com/login/?next=https%3A%2F%2Fwww.facebook.com%2Fplugins%2Flike.php%3Faction%3Dlike%26app_id%3D127564034422715%26channel%3Dhttps%253A%252F%252Fstaticxx.facebook.com%252Fx%252Fconnect%252Fxd_arbiter%252F%253Fversion%253D46%2523cb%253Df1a81ad9cadd798%2526domain%253Dwww.itmedia.co.jp%2526origin%253Dhttps%25253A%25252F%25252Fwww.itmedia.co.jp%25252Ff175235651f7204%2526relation%253Dparent.parent%26container_width%3D107%26href%3Dhttps%253A%252F%252Fwww.itmedia.co.jp%252Fmobile%252Farticles%252F2011%252F10%252Fnews111.html%26layout%3Dbutton_count%26locale%3Dja_JP%26sdk%3Djoey%26share%3Dfalse%26show_faces%3Dfalse' in a frame because it set 'X-Frame-Options' to 'deny'.
https://www.itmedia.co.jp/
Refused to display 'https://www.facebook.com/login/?next=https%3A%2F%2Fwww.facebook.com%2Fplugins%2Flike.php%3Faction%3Dlike%26app_id%3D127564034422715%26channel%3Dhttps%253A%252F%252Fstaticxx.facebook.com%252Fx%252Fconnect%252Fxd_arbiter%252F%253Fversion%253D46%2523cb%253Df1ad3ea8b34f348%2526domain%253Dwww.itmedia.co.jp%2526origin%253Dhttps%25253A%25252F%25252Fwww.itmedia.co.jp%25252Ff175235651f7204%2526relation%253Dparent.parent%26container_width%3D107%26href%3Dhttps%253A%252F%252Fwww.itmedia.co.jp%252Fmobile%252Farticles%252F2011%252F10%252Fnews121.html%26layout%3Dbutton_count%26locale%3Dja_JP%26sdk%3Djoey%26share%3Dfalse%26show_faces%3Dfalse' in a frame because it set 'X-Frame-Options' to 'deny'.
https://www.itmedia.co.jp/
Refused to display 'https://www.facebook.com/login/?next=https%3A%2F%2Fwww.facebook.com%2Fplugins%2Flike.php%3Faction%3Dlike%26app_id%3D127564034422715%26channel%3Dhttps%253A%252F%252Fstaticxx.facebook.com%252Fx%252Fconnect%252Fxd_arbiter%252F%253Fversion%253D46%2523cb%253Df22ac284c4e6cbc%2526domain%253Dwww.itmedia.co.jp%2526origin%253Dhttps%25253A%25252F%25252Fwww.itmedia.co.jp%25252Ff175235651f7204%2526relation%253Dparent.parent%26container_width%3D107%26href%3Dhttps%253A%252F%252Fwww.itmedia.co.jp%252Fnews%252Farticles%252F2011%252F10%252Fnews140.html%26layout%3Dbutton_count%26locale%3Dja_JP%26sdk%3Djoey%26share%3Dfalse%26show_faces%3Dfalse' in a frame because it set 'X-Frame-Options' to 'deny'.
https://www.itmedia.co.jp/
Refused to display 'https://www.facebook.com/login/?next=https%3A%2F%2Fwww.facebook.com%2Fplugins%2Flike.php%3Faction%3Dlike%26app_id%3D127564034422715%26channel%3Dhttps%253A%252F%252Fstaticxx.facebook.com%252Fx%252Fconnect%252Fxd_arbiter%252F%253Fversion%253D46%2523cb%253Df62ddb7f91055%2526domain%253Dwww.itmedia.co.jp%2526origin%253Dhttps%25253A%25252F%25252Fwww.itmedia.co.jp%25252Ff175235651f7204%2526relation%253Dparent.parent%26container_width%3D107%26href%3Dhttps%253A%252F%252Fwww.itmedia.co.jp%252Fnews%252Farticles%252F2011%252F10%252Fnews138.html%26layout%3Dbutton_count%26locale%3Dja_JP%26sdk%3Djoey%26share%3Dfalse%26show_faces%3Dfalse' in a frame because it set 'X-Frame-Options' to 'deny'.
https://www.itmedia.co.jp/
Refused to display 'https://www.facebook.com/login/?next=https%3A%2F%2Fwww.facebook.com%2Fplugins%2Flike.php%3Faction%3Dlike%26app_id%3D127564034422715%26channel%3Dhttps%253A%252F%252Fstaticxx.facebook.com%252Fx%252Fconnect%252Fxd_arbiter%252F%253Fversion%253D46%2523cb%253Df98e2c06c9ce58%2526domain%253Dwww.itmedia.co.jp%2526origin%253Dhttps%25253A%25252F%25252Fwww.itmedia.co.jp%25252Ff175235651f7204%2526relation%253Dparent.parent%26container_width%3D107%26href%3Dhttps%253A%252F%252Fwww.itmedia.co.jp%252Ffav%252Farticles%252F2011%252F10%252Fnews135.html%26layout%3Dbutton_count%26locale%3Dja_JP%26sdk%3Djoey%26share%3Dfalse%26show_faces%3Dfalse' in a frame because it set 'X-Frame-Options' to 'deny'.
83

SEO

Indicates how well the page is optimized for ranking in search engines and highlights Search Engine Optimization (SEO) opportunities for itmedia.co.jp. This includes optimizations such as providing meta data.

Content Best Practices

Document has a `<title>` element
Search engines, screen reader users and other assistive technology users rely on the title to provide an overview of the page and to help determine if the page is relevant to their search.
Document has a meta description
Meta descriptions may be used by search engines when displaying a link to the page and should concisely summarize the page's content.
Links have descriptive text
Make use of descriptive link text to assist search engines in understanding the content.
Document has a valid `hreflang`
Search engines can be instructed to list specific versions of a page for a given language or region through the use of hreflang links.
Document has a valid `rel=canonical`
Search engines can be suggested which URL should be shown in search results through the use of canonical links.
Document avoids plugins
The content of plugins cannot be indexed by search engines and many devices either restrict or do not support them.

Crawling and Indexing

Page has successful HTTP status code
Avoid pages with unsuccessful HTTP status codes as they may not be indexed by search engines.
Links are crawlable
Ensure that the 'href' attribute of anchor elements links to the appropriate destination. This allows for more pages of the site to be discovered by search engines.
Page isn’t blocked from indexing
Pages that cannot be crawled by search engines cannot be indexed or included in their search results. Ensure that search engines have permission to crawl all pages that should be indexed.
robots.txt is valid
Malformed robots.txt files prevent crawlers from understanding how a site wants to be crawled or indexed, which can be devastating to SEO.

Mobile Friendly

Document uses legible font sizes
Font sizes of 12px or less are too small to most mobile users without user gestures and further action. Aim for more than 60% of page text to use font sizes greater than 12px.
Tap targets are sized appropriately
Interactive elements (such as buttons and links) should be appropriately spaced, sized and easy enough to select or tap with regard to their surrounding elements.

Mobile Friendly

Does not have a `<meta name="viewport">` tag with `width` or `initial-scale`
It is advised to use a '<meta name="viewport">' tag for the optimization of itmedia.co.jp on mobile screens.

Content Best Practices

Image elements do not have `[alt]` attributes
Provide short and descriptive alternative text where possible on informative elements.
Failing Elements
img
img
img
img
img
img
img
img
img
img
img
img
img
img
img
img
img

Manual Checks

Structured data is valid
Structured data can be validated through the use of the Structured Data Testing Tool and the Structured Data Linter.
11

Progressive Web App

Indicates how valid the aspects of a Progressive Web App (PWA) are for the page and highlights opportunities to enable/improve the PWA of itmedia.co.jp. This includes details about web app manifests.

PWA Optimized

Redirects HTTP traffic to HTTPS
It is advised to redirect all HTTP traffic to HTTPS, in order to enable secure web features for all users.
Content is sized correctly for the viewport
Ensure that the width of the app's content matches the width of the viewport, otherwise the app might not be optimized for mobile screens.
Contains some content when JavaScript is not available
Apps should display alternative content for when JavaScript is disabled.

Fast and reliable

Page load is not fast enough on mobile networks — Interactive on simulated mobile network at 19.4 s
Ensure that the page loads fast enough over a cellular network, to ensure good mobile user experience.
Current page does not respond with a 200 when offline
In order for Progressive Web Apps to be made available offline, ensure that the app is using a service worker.
`start_url` does not respond with a 200 when offline
Consider using a service worker for Progressive Web Apps to ensure greater reliability for the user, in the case of poor network conditions.

Installable

Does not use HTTPS — 2 insecure requests found
Ensure that all pages are protected with HTTPS (including those that do not handle sensitive data) as HTTPS prevents tampering and passive listening on communications between the app and its users. Additionally, HTTPS is a prerequisite for HTTP/2 and many new web platform APIs.
Insecure URL
http://itmedia.co.jp/
http://www.itmedia.co.jp/
Does not register a service worker that controls page and `start_url`
A service worker is used to provide Progressive Web Apps the use of features such as working offline, the ability for the app to be added to the homescreen as well as push notifications.
Web app manifest does not meet the installability requirements
User engagement may be increased by leveraging the browsers ability to proactively prompt users to add the app to their homescreen.
View Data

PWA Optimized

Is not configured for a custom splash screen
Themed splash screens ensure a high-quality user experience at launch for app users.
View Data
Does not set a theme color for the address bar.
A theme may be applied to the browser address bar, which ideally can be made to match the site.
View Data
Does not have a `<meta name="viewport">` tag with `width` or `initial-scale`
It is advised to use a '<meta name="viewport">' tag for the optimization of itmedia.co.jp on mobile screens.
Does not provide a valid `apple-touch-icon`
iOS users of Progressive Web Apps will benefit from an apple touch icon, which can be defined with 'apple-touch-icon', which must point to a non-transparent 192px (or 180px) square PNG.
Manifest doesn't have a maskable icon
Maskable icons are great to ensure that images fill the entire shape when installing the app on a device.

Manual Checks

Site works cross-browser
Ensure that the Progressive Web App works correctly across every major browser.
Page transitions don't feel like they block on the network
Users perceive apps with responsive, snappy transitions as higher peforming and ensures a great user experience, even on a slow network.
Each page has a URL
Ensure that all pages are deep linkable via URL. They should also be unique for the purpose of shareability on social media.
Avg. (All Categories) 49
Performance 12
Accessibility 51
Best Practices 71
SEO 86
Progressive Web App 25
0–49 (Fail) 50–89 (Average) 90–100 (Pass)
URL: https://www.itmedia.co.jp/spv/
Updated: 10th November, 2020

0.88 seconds
First Contentful Paint (FCP)
80%
18%
2%

0.02 seconds
First Input Delay (FID)
99%
1%
0%

Simulate loading on mobile
12

Performance

Indicates how well the page is performing and highlights opportunities where performance may be improved for itmedia.co.jp. This includes details about optimizing page load times which can result in a better user experience.

Opportunities

Properly size images
Images can slow down the page's load time. Itmedia.co.jp should consider serving more appropriate-sized images.
Defer offscreen images
Time to Interactive can be slowed down by resources on the page. Itmedia.co.jp should consider lazy-loading offscreen and hidden images.
Minify CSS
Cascading Style Sheets (CSS) files can contribute to network payload sizes. Itmedia.co.jp should consider minifying CSS files.
Minify JavaScript — Potential savings of 11 KiB
JavaScript (JS) files can contribute to network payload sizes and increase script parse times. Itmedia.co.jp should consider minifying JS files.
URL Transfer Size (Bytes) Potential Savings (Bytes)
https://www.googletagmanager.com/gtm.js?id=GTM-W3CLTQN
47589
6466
https://www.itmedia.co.jp/js/spv/html5base.js?date=202002281825
8321
2488
https://pixel.adsafeprotected.com/jload?anId=928886&ias_adpath=adsafe
14208
2470
Remove unused CSS
Dead and/or unused rules in Style Sheets (CSS) can contribute to network payload sizes. Itmedia.co.jp should consider removing dead rules from style sheets and deferring the loading of CSS not used for above-the-fold content.
Preconnect to required origins
Resource hints, such as 'preconnect' or 'dns-prefetch', may assist in establishing early connections to important third-party origins.
Initial server response time was short — Root document took 170 ms
It is advised to keep the server response time short for the main document, because all other requests depend on it.
URL Time Spent (Ms)
https://www.itmedia.co.jp/spv/
172.95
Preload key requests
Key requests can be preloaded by using '<link rel=preload>'. Itmedia.co.jp should consider using '<link rel=preload>' to prioritize fetching resources that are currently requested later in page load.
Use video formats for animated content
Large GIFs are inefficient for delivering animated content. It is recommended to use MPEG4/WebM videos for animations and PNG/WebP for static images instead of GIF.
Remove duplicate modules in JavaScript bundles — Potential savings of 8 KiB
Ensure that no duplicate JavaScript modules from bundles exist to reduce bytes consumed by network activity.
Source Transfer Size (Bytes) Potential Savings (Bytes)
Other
5171
src/url.js
1758
src/service.js
1269
Avoid serving legacy JavaScript to modern browsers — Potential savings of 24 KiB
Polyfills and transforms enable legacy browsers to use new JavaScript features. For bundled JavaScript it is recommended to adopt a modern script deployment strategy using module/nomodule feature detection. This will reduce the amount of code shipped to modern browsers.
URL Potential Savings (Bytes)
https://connect.facebook.net/signals/config/185005748502834?v=2.9.27&r=stable
12157
https://cs.nakanohito.jp/b3/bi.js
7026
https://static.adsafeprotected.com/sca.17.4.114.js
5410
https://i.yimg.jp/images/listing/tool/yads/yads-timeline-ex.js
93
https://yads.c.yimg.jp/js/yads-async.js
72
https://connect.facebook.net/en_US/fbevents.js
45

Diagnostics

Avoids enormous network payloads — Total size was 1,709 KiB
Large network payloads can cost users money and are linked to long load times.
URL Transfer Size (Bytes)
https://static.zucks.net.zimg.jp/image/2020/02/10/c/110915_phpolY1UG.jpeg
267429
https://tpc.googlesyndication.com/simgad/13544824803651436720/downsize_200k_v1?w=1200&h=628
169563
https://static.zucks.net.zimg.jp/image/2020/02/10/c/110915_phpCyIkOt.jpeg
124936
https://securepubads.g.doubleclick.net/gpt/pubads_impl_2020110401.js
100913
https://connect.facebook.net/signals/config/185005748502834?v=2.9.27&r=stable
71190
https://connect.facebook.net/ja_JP/sdk.js?hash=3505d47c0be0c5df3446fb46042ceeaf&ua=modern_es6
61108
https://cdn.ampproject.org/rtv/012010270040000/amp4ads-v0.js
58331
https://static.adsafeprotected.com/main.gr.19.8.141.js
57911
https://www.googletagmanager.com/gtm.js?id=GTM-W3CLTQN
47589
https://www.googletagmanager.com/gtag/js?id=AW-1032582312
39109
Avoids an excessive DOM size — 363 elements
A large DOM (Document Object Model) will increase memory usage, cause longer system calculations as well as costly layout reflows.
Statistic Element Value
Total DOM Elements
363
Maximum DOM Depth
SHOW DETAILS
16
Maximum Child Elements
SHOW DETAILS
29
Avoid chaining critical requests — 33 chains found
Below is a list of Critical Request Chains, which shows which resources are loaded with a high priority. Itmedia.co.jp should consider reducing the length of chains, reducing the download size of resources, or deferring the download of unnecessary resources to improve page load.
User Timing marks and measures — 8 user timings
Make use of the User Timing API to measure an app's real-world performance during key user experiences.
Name Type Start Time (Ms) Duration (Ms)
is
Mark
2462.221
dr
Mark
2463.757
ol
Mark
2463.896
visible
Mark
2485.288
ofv
Mark
2485.389
mbv
Mark
2500.72
e_is
Mark
2500.943
pc
Mark
2618.47
Keep request counts low and transfer sizes small — 175 requests • 1,709 KiB
It is advised to add a budgets.json file in order to set budgets for the quantity and size of page resources.
Resource Type Requests Transfer Size (Bytes)
Total
175
1749802
Script
92
928558
Image
52
671615
Font
3
54506
Document
7
44930
Other
12
27940
Stylesheet
9
22253
Media
0
0
Third-party
111
1598740
Largest Contentful Paint element — 1 element found
The element which was identified as the Largest Contentful Paint.
Element
山下智久、10月末でジャニーズ退所　理由は「活動拠点を海外に」「現在オファーがある海外作品への参加」
Avoid large layout shifts — 5 elements found
Below is a list of all DOM elements that contribute to the CLS of the page.
Element CLS Contribution
モフモフの子ぎつね→シュッとしたイケメンに！　わずか5カ月で成長したハンサムキツネに驚きの声 11月10日 21時00分 神奈川はな，ねとらぼ 山下智久、10…
0.083179149779025
アトラスなのにちゃんと原作尊重してて偉い！　令和によみがえった「真・女神転生III」、歴年のファンから見た良い点・ダメな点 11月10日 20時30分 するめ…
0.0096811837034969
モフモフの子ぎつね→シュッとしたイケメンに！　わずか5カ月で成長したハンサムキツネに驚きの声
0.0087097724135202
11月10日 20時30分 沓澤真二，ねとらぼ
0.0042917719139085
a
0.0041161495337997
Avoid long main-thread tasks — 20 long tasks found
Below is a list of the longest tasks on the main thread, which is useful when identifying the worst input delay contributors.
URL Start Time (Ms) Duration (Ms)
https://static.adsafeprotected.com/sca.17.4.114.js
18420
1228
https://tpc.googlesyndication.com/sodar/sodar2/219/runner.html
21189
364
https://tpc.googlesyndication.com/sodar/sodar2/219/runner.html
20653
320
https://tpc.googlesyndication.com/sodar/sodar2/219/runner.html
20318
218
https://pixel.adsafeprotected.com/jload?anId=928886&ias_adpath=adsafe
16950
215
https://securepubads.g.doubleclick.net/gpt/pubads_impl_2020110401.js
15780
213
https://www.itmedia.co.jp/spv/
756
174
https://s-rtb.send.microadinc.com/ad?spot=02d4d81f406b2b3e25e10fb1a66ced88&cb=microadCompass.AdRequestor.callback&url=https%3A%2F%2Fwww.itmedia.co.jp%2Fspv%2F&referrer=https%3A%2F%2Fwww.itmedia.co.jp%2F&cbt=3c5c190a0ecf100175b2584955
13140
144
https://scdn.cxense.com/cx.js
11830
137
https://connect.facebook.net/signals/config/185005748502834?v=2.9.27&r=stable
13284
131
https://cdn.ampproject.org/rtv/012010270040000/amp4ads-v0.js
19758
125
https://securepubads.g.doubleclick.net/gpt/pubads_impl_2020110401.js
17340
124
https://tr.api.itmedia.jp/v1.js
9690
120
https://tpc.googlesyndication.com/sodar/sodar2/219/runner.html
21073
116
https://pagead2.googlesyndication.com/bg/NNBFmmTfMeJXqygf8DIqtKAQbNdjHZQ4KGfsPIMPfu8.js
20011
115
https://scdn.cxense.com/cx.js
6390
113
https://cdn.ampproject.org/rtv/012010270040000/amp4ads-v0.js
19648
110
https://www.google-analytics.com/analytics.js
10650
105
https://securepubads.g.doubleclick.net/gpt/pubads_impl_2020110401.js
963
81
https://www.itmedia.co.jp/spv/
630
79
Avoid non-composited animations
It is recommended to avoid non-composited animations which are often janky and increase CLS.
Avoids large JavaScript libraries with smaller alternatives — 0 large libraries found
It is recommended to work with smaller JavaScript libraries to reduce your bundle size and avoid poor performance.

Budgets

Performance budget
It is advised to keep the quantity and size of all network requests under the targets set by the provided performance budget.
Timing budget
It is advised to set a timing budget to monitor the performance of your site.

Other

Network Requests
Below is a list of network requests that were made during page load.
URL Start Time (Ms) End Time (Ms) Transfer Size (Bytes) Resource Size (Bytes) Status Code MIME Type Resource Type
http://itmedia.co.jp/
0
167.1459999925
231
0
301
text/html
http://www.itmedia.co.jp/
167.74400000577
338.15299998969
291
0
301
text/html
https://www.itmedia.co.jp/
338.63099999144
515.27499998338
24909
116136
200
text/html
Document
https://www.itmedia.co.jp/js/spv/movePC2SP.js?date=200721152649
551.36499999207
719.27199998754
4501
25403
200
application/javascript
Script
https://www.itmedia.co.jp/css/base.css?201912041620
551.71199998586
718.15100000822
5064
26431
200
text/css
Stylesheet
https://www.itmedia.co.jp/css/ad.css?202003131035
551.89199998858
719.66500001145
1484
3280
200
text/css
Stylesheet
https://www.itmedia.co.jp/css/top.css?201104011055
552.12400000892
721.26200000639
455
20
200
text/css
Stylesheet
https://www.itmedia.co.jp/css/top/base.css?201810161549
552.36100000911
721.75500000594
4107
19778
200
text/css
Stylesheet
https://www.itmedia.co.jp/css/top/ad.css?202010081719
552.77199999546
720.55999998702
1325
3180
200
text/css
Stylesheet
https://www.itmedia.co.jp/css/top/top.css?201406191729
552.89600000833
718.84200000204
373
6
200
text/css
Stylesheet
https://ajax.googleapis.com/ajax/libs/jquery/1.6.4/jquery.min.js
553.02500000107
561.847999983
32960
91668
200
text/javascript
Script
https://fc.itmedia.co.jp/fpcookie?site_id=itm_
552.12800001027
905.41599999415
0
0
-1
Script
https://www.itmedia.co.jp/js/scAccount.js
552.30899999151
906.29300000728
0
0
-1
Script
https://www.itmedia.co.jp/js/dlvRequest.js
553.92099998426
722.42299999925
3247
8575
200
application/javascript
Script
https://www.itmedia.co.jp/js/scRequest.js
552.67599999206
905.82099999301
0
0
-1
Script
https://www.itmedia.co.jp/js/dlvRequest_cx.js?201711221648
552.90599999717
906.06700000353
0
0
-1
Script
https://www.itmedia.co.jp/js/base.js?201906041205
554.86400000518
884.76799998898
19566
86613
200
application/javascript
Script
https://www.itmedia.co.jp/js/ad.js?201302061956
553.43199998606
906.55899999547
0
0
-1
Script
https://www.itmedia.co.jp/js/top.js?201010281942
555.18999998458
736.7840000079
471
22
200
application/javascript
Script
https://www.itmedia.co.jp/js/top/base.js?201502232106
554.11599998479
906.36500000255
0
0
-1
Script
https://www.itmedia.co.jp/js/top/ad.js?201107191418
554.21000000206
905.471999984
0
0
-1
Script
https://www.itmedia.co.jp/js/top/top.js?201107191418
554.29000000004
905.9459999844
0
0
-1
Script
https://tr.api.itmedia.jp/v1.js
555.36100000609
730.82100000465
285
41
200
text/javascript
Script
https://www.itmedia.co.jp/js/lib/cx_v2.js?202006301534
554.66600001091
905.53399999044
0
0
-1
Script
https://www.itmedia.co.jp/css/gnavi.css?date=202001281043
554.91199999233
905.61600000365
0
0
-1
Stylesheet
https://image.itmedia.co.jp/images/logo/pcvheader_top.png
555.19499999355
905.63299998757
0
0
-1
Image
https://www.itmedia.co.jp/js/gnavi.js?202008171808
555.31299998984
905.72300000349
0
0
-1
Script
https://image.itmedia.co.jp/news/articles/2011/10/top_news140.jpg
555.43800001033
907.21499998472
0
0
-1
Image
https://b.st-hatena.com/images/entry-button/button-only@2x.png
555.53700000746
906.58300000359
0
0
-1
Image
https://image.itmedia.co.jp/news/articles/2011/10/top_news138.jpg
555.6290000095
905.96299999743
0
0
-1
Image
https://image.itmedia.co.jp/fav/articles/2011/10/top_news135.jpg
555.74499999057
905.88499998557
0
0
-1
Image
https://image.itmedia.co.jp/news/articles/2011/10/top_news123.jpg
555.86500000209
905.45500000007
0
0
-1
Image
https://image.itmedia.co.jp/mobile/articles/2011/10/top_news121.jpg
555.98400000599
906.60099999513
0
0
-1
Image
https://image.itmedia.co.jp/mobile/articles/2011/10/top_news111.jpg
556.12299998756
905.83999999217
0
0
-1
Image
https://image.itmedia.co.jp/enterprise/articles/2011/10/top_news013.jpg
559.40699999337
905.5459999945
0
0
-1
Image
https://image.itmedia.co.jp/mobile/articles/2011/10/top_news132.jpg
559.61900000693
905.55699999095
0
0
-1
Image
https://image.itmedia.co.jp/pcuser/articles/2011/10/top_news099.jpg
559.7129999951
905.86599998642
0
0
-1
Image
https://image.itmedia.co.jp/business/articles/2011/10/top_news120.jpg
559.78000001051
905.25099998922
0
0
-1
Image
https://image.itmedia.co.jp/mn/articles/2011/10/top_news030.jpg
559.98699998599
907.27999998489
0
0
-1
Image
https://www.itmedia.co.jp/js/top/rss_channelArt_altblog.js
560.07400000817
906.77899998263
0
0
-1
Script
https://www.itmedia.co.jp/json/top/rss_artRank2.json
560.86999998661
906.95099998266
0
0
-1
Script
https://b.st-hatena.com/js/bookmark_button.js
561.00899999728
905.98199999658
0
0
-1
Script
https://api.popin.cc/searchbox/itmedia.js
561.14299999899
905.43700000853
0
0
-1
Script
https://image.itmedia.co.jp/images/logo/170_itmedia_bgw.gif
561.30000000121
905.66499999841
0
0
-1
Image
https://www.itmedia.co.jp/js/masterBodyEnd.js?202006011249
561.3730000041
906.62500000326
0
0
-1
Script
https://www.itmedia.co.jp/js/itmid/smartPhoneHeadLink.js
561.44200000563
906.9319999835
0
0
-1
Script
https://www.itmedia.co.jp/include/sc/s_code.js?20170501
561.52699998347
907.15600000112
0
0
-1
Script
https://www.itmedia.co.jp/js/itmdp_code.js
562.43200000608
905.29299998889
0
0
-1
Script
https://www.googletagmanager.com/gtag/js?id=AW-1032582312
562.72099999478
905.28099998483
0
0
-1
Script
https://www.itmedia.co.jp/js/v6_survey.js?date=202002061432
562.84199998481
905.69899999537
0
0
-1
Script
https://www.itmedia.co.jp/spv/
730.27999998885
902.23199999309
10988
34595
200
text/html
Document
https://www.itmedia.co.jp/js/spv/movePC2SP.js?date=202007211526
919.93400000501
1089.0450000006
4501
25403
200
application/javascript
Script
https://www.itmedia.co.jp/css/spv/html5base_v2.css?date=202010081724
920.17900000792
1090.4569999839
7710
34259
200
text/css
Stylesheet
https://www.itmedia.co.jp/js/spv/html5base.js?date=202002281825
920.37400000845
1088.3500000054
8321
29560
200
application/javascript
Script
https://tr.api.itmedia.jp/v1.js
920.80299998634
1101.6170000075
285
41
200
text/javascript
Script
https://fc.itmedia.co.jp/fpcookie?site_id=itm_
1098.3459999843
1281.5199999895
613
25
200
text/javascript
Script
https://scdn.cxense.com/cx.js
921.10599999432
969.47099998943
25225
104562
200
application/x-javascript
Script
https://www.itmedia.co.jp/js/lib/cx_v2.js?date=202006301534
921.40600000857
1089.5409999939
8018
29683
200
application/javascript
Script
https://image.itmedia.co.jp/images/logo/spvheader_top.gif
1104.794999992
1272.0240000053
2049
1482
200
image/gif
Image
https://www.itmedia.co.jp/js/spv/html5base_async.js?date=202007131025
1106.1629999895
1288.1059999927
10139
40050
200
application/javascript
Script
https://connect.facebook.net/ja_JP/sdk.js
1106.3560000039
1180.7240000053
2681
3224
200
application/x-javascript
Script
https://www.googletagmanager.com/gtag/js?id=AW-1032582312
1106.6749999882
1128.9380000089
39109
97093
200
application/javascript
Script
https://www.itmedia.co.jp/js/lib/get_socialcount.js?date=202001081113
1106.9480000006
1273.6629999999
2095
6630
200
application/javascript
Script
https://www.itmedia.co.jp/js/v6_survey.js?date=202002061432
1107.0729999919
1270.7419999933
902
790
200
application/javascript
Script
https://www.googletagmanager.com/gtm.js?id=GTM-W3CLTQN
1107.2470000072
1132.7719999827
47589
258885
200
application/javascript
Script
https://cx.api.itmedia.co.jp/v1.js
1127.6829999988
1784.7719999845
341
255
200
text/javascript
Script
https://api.cxense.com/profile/user/segment?callback=cXJsonpCBkhc0g6gqumy82hs2&persisted=32780b6d6fb51c7b1fefeb67a7e3305b165e5c6a&json=%7B%22identities%22%3A%5B%7B%22id%22%3A%22khc0g6gn5nzatjer%22%2C%22type%22%3A%22cx%22%7D%5D%7D
1134.1020000109
1192.7600000054
694
77
200
text/javascript
Script
https://image.itmedia.co.jp/spv/images/head_menu.gif
1788.6730000027
1954.8420000065
1638
1071
200
image/gif
Image
https://dlv.itmedia.jp/adsv/v1?posall=CBOX&oe=shift_jis&nurl=https%3A//www.itmedia.co.jp/spv/&fp=root%2Fsmartphone%2Ftop&word=IT%2C%E3%83%8B%E3%83%A5%E3%83%BC%E3%82%B9%2C%E3%82%A8%E3%83%B3%E3%82%BF%E3%83%BC%E3%83%97%E3%83%A9%E3%82%A4%E3%82%BA%2C%E3%83%A2%E3%83%90%E3%82%A4%E3%83%AB%2C%E3%83%A9%E3%82%A4%E3%83%95%E3%82%B9%E3%82%BF%E3%82%A4%E3%83%AB%2CPC%2C%E3%82%B2%E3%83%BC%E3%83%A0%2Cblog&rnd=1605014931281&composite=1605014930588&ref=https%3A//www.itmedia.co.jp/&x-cxsegids=&t=js
1797.3139999958
2058.2749999885
849
87
200
application/x-javascript
Script
https://dlv.itmedia.jp/adsv/v1?posall=TOPINF1&oe=shift_jis&nurl=https%3A//www.itmedia.co.jp/spv/&fp=root%2Fsmartphone%2Ftop&word=IT%2C%E3%83%8B%E3%83%A5%E3%83%BC%E3%82%B9%2C%E3%82%A8%E3%83%B3%E3%82%BF%E3%83%BC%E3%83%97%E3%83%A9%E3%82%A4%E3%82%BA%2C%E3%83%A2%E3%83%90%E3%82%A4%E3%83%AB%2C%E3%83%A9%E3%82%A4%E3%83%95%E3%82%B9%E3%82%BF%E3%82%A4%E3%83%AB%2CPC%2C%E3%82%B2%E3%83%BC%E3%83%A0%2Cblog&rnd=1605014931547&composite=1605014930588&ref=https%3A//www.itmedia.co.jp/&x-cxsegids=&t=js
2063.1460000004
2228.9279999968
1346
583
200
application/x-javascript
Script
2063.8259999978
2063.8770000078
0
49
200
image/gif
Image
https://image.itmedia.co.jp/spv/images/author_update.png
2065.2319999936
2229.1379999951
1058
492
200
image/png
Image
https://dlv.itmedia.jp/adsv/v1?posall=RECTANGL&oe=shift_jis&nurl=https%3A//www.itmedia.co.jp/spv/&fp=root%2Fsmartphone%2Ftop&word=IT%2C%E3%83%8B%E3%83%A5%E3%83%BC%E3%82%B9%2C%E3%82%A8%E3%83%B3%E3%82%BF%E3%83%BC%E3%83%97%E3%83%A9%E3%82%A4%E3%82%BA%2C%E3%83%A2%E3%83%90%E3%82%A4%E3%83%AB%2C%E3%83%A9%E3%82%A4%E3%83%95%E3%82%B9%E3%82%BF%E3%82%A4%E3%83%AB%2CPC%2C%E3%82%B2%E3%83%BC%E3%83%A0%2Cblog&rnd=1605014931640&composite=1605014930588&ref=https%3A//www.itmedia.co.jp/&x-cxsegids=&t=js
2156.2240000057
2324.695999996
1697
934
200
application/x-javascript
Script
https://image.itmedia.co.jp/nl/articles/2011/10/top_news104.jpg
2157.5719999964
2324.9680000008
2943
2375
200
image/jpeg
Image
https://image.itmedia.co.jp/nl/articles/2011/10/top_news029.jpg
2158.0459999968
2322.2020000103
2868
2300
200
image/jpeg
Image
https://image.itmedia.co.jp/nl/articles/2011/10/top_news142.jpg
2158.3889999893
2324.2650000029
3895
3327
200
image/jpeg
Image
https://image.itmedia.co.jp/nl/articles/2011/10/top_news141.jpg
2158.8530000008
2323.9360000007
3529
2961
200
image/jpeg
Image
https://image.itmedia.co.jp/nl/articles/2011/10/top_news049.jpg
2159.2349999992
2326.2919999834
8038
7470
200
image/jpeg
Image
https://j.microad.net/js/compass.js
2234.9910000048
2256.9509999885
226
0
302
https://jgl.microad.net/js/compass.js
2257.2839999921
2287.8670000064
19962
84085
200
application/javascript
Script
https://cache.send.microadinc.com/js/cookie_loader.html
2312.7579999855
2484.3950000068
1607
1909
200
text/html
Document
https://s-rtb.send.microadinc.com/ad?spot=02d4d81f406b2b3e25e10fb1a66ced88&cb=microadCompass.AdRequestor.callback&url=https%3A%2F%2Fwww.itmedia.co.jp%2Fspv%2F&referrer=https%3A%2F%2Fwww.itmedia.co.jp%2F&cbt=3c5c190a0ecf100175b2584955
2313.427999994
2979.3300000019
10467
9953
200
text/javascript
Script
https://www.googletagservices.com/tag/js/gpt.js
2334.8870000045
2341.8160000001
19520
55343
200
text/javascript
Script
https://dlv.itmedia.jp/adsv/v1?posall=5FTDMP&oe=shift_jis&nurl=https%3A//www.itmedia.co.jp/spv/&fp=root%2Fsmartphone%2Ftop&word=IT%2C%E3%83%8B%E3%83%A5%E3%83%BC%E3%82%B9%2C%E3%82%A8%E3%83%B3%E3%82%BF%E3%83%BC%E3%83%97%E3%83%A9%E3%82%A4%E3%82%BA%2C%E3%83%A2%E3%83%90%E3%82%A4%E3%83%AB%2C%E3%83%A9%E3%82%A4%E3%83%95%E3%82%B9%E3%82%BF%E3%82%A4%E3%83%AB%2CPC%2C%E3%82%B2%E3%83%BC%E3%83%A0%2Cblog&rnd=1605014931816&composite=1605014930588&ref=https%3A//www.itmedia.co.jp/&x-cxsegids=&t=js
2335.8489999955
2500.0179999915
850
88
200
application/x-javascript
Script
https://securepubads.g.doubleclick.net/gpt/pubads_impl_2020110401.js
2364.3940000038
2376.4220000012
100913
283161
200
text/javascript
Script
https://adservice.google.com/adsid/integrator.js?domain=www.itmedia.co.jp
2443.5010000016
2448.7110000046
1165
109
200
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https://i.yimg.jp/images/listing/tool/yads/yads-timeline-ex.js
5141.6120000067
5653.7499999977
2769
4955
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application/javascript
Script
https://pagead2.googlesyndication.com/pagead/gen_204?id=sodar2&v=219&t=2&li=gpt_2020110401&jk=1469246575900060&bg=!FRalFjbNAAUBH37qAVjoDRTwTkahQAIAAAKJUgAAAHtoAQcKAS2KlDxu-hxYQcXQ5YtIE-CZeA2jnLdcNp6RTKwYgDwQ6GbqBSAajfzWBjAECjXfMVPFVH9dU7fVIeBvAa2j709Twro7bU-pKyoIe2cGxSQkjRmLa6SAQmOkmEV01pzgvQTrV7wdA53seCE7_hB-MyQqKkn8pdQo8Rh_W2hWNSOMDpB8zF9VnY-TDeFObeb3LeY2DZaf0OSnxIYRt0u_kbzRZ0U_OKvkaxi91iEEp0Dw-huDP_A3fuh7OxKDLyJS57PF6Z1xELmSrv7xwzUV1CH0PQiLDEp3qypi4uAxT0rKCzh3Myqb4MIWhdzM5I4JEA-PxENJLH6D0yuXiVVDDN8YdXgHruLDJXI3aX5cLkgwFITeMRC96cTgD0y9onNyNT96CUksXqBMa8Hj4VyOmQHYLBTjALZVmy-0cnjeoJSqgPw5BQAJuoVxTYte5aZDnSalRWq3_HjlxKkO70j2yoPR-c3qfnOHLS3UsXQeSl36sR6mzN6qD4RUVrcFGfupkJKP1VGNZEflGkofkKT6SWADmwVR8287cWQrgwWef5O0HYeJvrt_dg9FC2qf-13kcys94Su1A9O-IDaMF_f-vCzKbQqOwWjF1QFxkpw77Pc6vGExrPoa_BoWFmShVcQ1LoaospnxGkA-BCw3UC-akiAqRoT1bBn19Q4HLCX75yb7Suq_VoC1WDTHHsM7yry0iLhCrxdhd5XXolIW9DEq1gbsBHi4vFsnkRzZTS62UwBgY2ocI_anjQAue3pbu_Bzb_0ihazyjQNtjiCcHh9QdFjAqXvc25oQRGmfzxyZLvGnVYPJoBIAKqAtm5EzGVkroxG5Nc8QOLHMBqzo-yS-TA10_0LvpRqEP7TJ802RIrQipRIIS4gitrThWBhlbI-7e2h6IvvCQZMRsy87A8fZ0p0SX3fUYd3SuwAtGdLIkRJMLs8TGvnyKoTCw7C1SGEyWTSDrkoK5X4Nm4nwZayxt1Y6698-W3lO1rf0OFSbaPCAUEAKf2PAwDkn_N7ivZESNByeMRpQcEHTlQ
5370.0639999879
5384.7660000029
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image/gif
Image
https://s.yimg.jp/images/listing/tool/yads/uadf/yads_vimps.js
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5830.3460000025
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application/javascript
Script
https://s.yimg.jp/images/advertising/common/js/iicon.min.js
5844.0669999982
6014.1569999978
5882
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application/javascript
Script
https://yads.yjtag.yahoo.co.jp/tag?s=97383_120267&fr_id=yads_7741320-0&p_elem=yads-timeline-97383_120267-3941384&sb_support=1&enc=SHIFT_JIS&u=https%3A%2F%2Fwww.itmedia.co.jp%2Fspv%2F&ref=https%3A%2F%2Fwww.itmedia.co.jp%2F&async=1&mb=1&kwe=u&kwm=1&pv_id=50891295-595d-4851-adb0-543f338f1d05
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6539.2219999922
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text/javascript
Script
https://im.ov.yahoo.co.jp/tag/?adprodset=97383_120267-137570-150599&p_elem=yads-timeline-97383_120267-3941384&vimps_mode=1&enc=SHIFT_JIS&u=https%3a%2f%2fwww.itmedia.co.jp%2fspv%2f&sb_support=1&cb=1605014935334&measurable=1&pv_id=50891295-595d-4851-adb0-543f338f1d05&yield_opt_type=0
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7067.0349999855
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text/javascript
Script
Network Round Trip Times — 0 ms
High Network RTT (Round Trip Times) can have a large impact on performance. Providing servers geographically closer to the user could improve performance.
Server Backend Latencies — 0 ms
High server latencies indicate the server is overloaded or has a poor backend performance.
Tasks
Below is a list of the top-level main thread tasks that executed during page load.
Start Time (Ms) End Time (Ms)
558.47
19.745
579.228
5.963
587.526
8.139
595.682
5.362
759.028
7.194
942.463
10.626
1128.364
6.072
1141.971
30.122
1187.163
18.406
1206.216
15.665
1824.929
7.173
2101.089
86.825
2188.026
5.546
2330.519
19.542
2383.553
18.102
2415.693
106.64
2524.566
5.081
2531.039
8.163
2545.941
5.973
2718.997
5.846
2724.873
16.389
2741.56
35.029
2776.65
5.253
2785.175
7.383
2792.59
28.358
2823.468
34.337
2859.462
10.335
2876.754
5.795
2882.833
18.379
2901.938
14.379
2917.051
11.2
2930.835
61.99
3000.666
6.894
3008.789
19.291
3034.196
26.218
3061.848
40.711
3117.06
5.814
3131.511
5.487
3141.145
8.059
3154.361
10.751
3167.036
6.21
3173.28
36.024
3214.181
54.779
3268.986
6.53
3275.572
32.636
3314.901
31.332
3346.338
11.119
3359.71
5.647
3365.804
10.885
3378.74
5.918
3384.676
7.745
3392.437
14.41
3406.865
11.386
3431.188
11.477
3444.583
37.948
3482.574
7.232
3493.328
6.224
3518.081
53.694
3579.77
7.419
3593.873
5.622
3600.629
17.06
3619.058
6.462
3659.423
8.7
3796.6
18.989
3821.015
6.599
3875.394
307.086
4493.374
10.318
4511.982
8.988
4524.004
8.965
4540.688
8.346
4564.774
28.676
4610.603
12.063
4622.683
11.038
4633.803
12.592
4670.354
11.737
4682.884
11.862
4696.002
54.407
4800.777
17.461
4850.736
6.677
4870.093
11.671
4891.122
8.902
4930.685
79.979
5101.648
12.922
5114.584
5.513
5151.764
11.903
5167.853
11.367
5180.307
29
5231.277
5.744
5260.408
90.971
5401.863
5.432
5692.876
5.597
5870.049
11.355
Diagnostics
Below is a collection of useful page vitals.
View Data
Metrics
Below is a collection of metrics.
View Data

Metrics

Cumulative Layout Shift — 0.11
Cumulative Layout Shift is the measurement of visible elements collective movement within the viewport.
View Data

Opportunities

Eliminate render-blocking resources — Potential savings of 660 ms
Resources, such as JavaScript and style sheets, can block the first paint of the page. Itmedia.co.jp should consider delivering critical JavaScript/style sheets (JS/CSS) inline and deferring all non-critical JS/CSS.
URL Transfer Size (Bytes) Potential Savings (Ms)
https://www.itmedia.co.jp/js/spv/movePC2SP.js?date=202007211526
4501
330
https://www.itmedia.co.jp/css/spv/html5base_v2.css?date=202010081724
7710
330
https://www.itmedia.co.jp/js/spv/html5base.js?date=202002281825
8321
330
https://tr.api.itmedia.jp/v1.js
285
480
Efficiently encode images — Potential savings of 133 KiB
Unoptimized images can consume more cellular data than what is necessary.
URL Resource Size (Bytes) Potential Savings (Bytes)
https://tpc.googlesyndication.com/simgad/13544824803651436720/downsize_200k_v1?w=1200&h=628
168906
106164
https://static.zucks.net.zimg.jp/image/2020/02/10/c/110915_phpolY1UG.jpeg
266963
29922
Serve images in next-gen formats — Potential savings of 337 KiB
Image formats like PNG and JPEG have poor compression when compared to other next-gen formats, such as JPEG 200, JPEG XR and WebP.
URL Resource Size (Bytes) Potential Savings (Bytes)
https://static.zucks.net.zimg.jp/image/2020/02/10/c/110915_phpolY1UG.jpeg
266963
143421
https://tpc.googlesyndication.com/simgad/13544824803651436720/downsize_200k_v1?w=1200&h=628
168906
129934
https://static.zucks.net.zimg.jp/image/2020/02/10/c/110915_phpCyIkOt.jpeg
124470
63696
https://img.itmedia.jp/so/images/sa/b/286/293870/300922891/240B_Sky2.jpg
17274
8456
Enable text compression — Potential savings of 18 KiB
Text-based resources should be served with compression, such as gzip, deflate or brotli.
URL Transfer Size (Bytes) Potential Savings (Bytes)
https://s-rtb.send.microadinc.com/ad?spot=02d4d81f406b2b3e25e10fb1a66ced88&cb=microadCompass.AdRequestor.callback&url=https%3A%2F%2Fwww.itmedia.co.jp%2Fspv%2F&referrer=https%3A%2F%2Fwww.itmedia.co.jp%2F&cbt=3c5c190a0ecf100175b2584955
9953
7152
https://s-rtb.send.microadinc.com/ad?spot=026e18e7d359d1b010dc11395bf6efa3&cb=microadCompass.AdRequestor.callback&url=https%3A%2F%2Fwww.itmedia.co.jp%2Fspv%2F&referrer=https%3A%2F%2Fwww.itmedia.co.jp%2F&cbt=d6d3ac85445cc80175b2584c4e
9701
6944
https://dlv.itmedia.jp/adsv/v1?posall=10FEATURES&oe=shift_jis&nurl=https%3A//www.itmedia.co.jp/spv/&fp=root%2Fsmartphone%2Ftop&word=IT%2C%E3%83%8B%E3%83%A5%E3%83%BC%E3%82%B9%2C%E3%82%A8%E3%83%B3%E3%82%BF%E3%83%BC%E3%83%97%E3%83%A9%E3%82%A4%E3%82%BA%2C%E3%83%A2%E3%83%90%E3%82%A4%E3%83%AB%2C%E3%83%A9%E3%82%A4%E3%83%95%E3%82%B9%E3%82%BF%E3%82%A4%E3%83%AB%2CPC%2C%E3%82%B2%E3%83%BC%E3%83%A0%2Cblog&rnd=1605014931992&composite=1605014930588&ref=https%3A//www.itmedia.co.jp/&x-cxsegids=&t=js
5871
4460

Metrics

First Contentful Paint — 5.2 s
The time taken for the first image or text on the page to be rendered.
Speed Index — 10.5 s
The time taken for the page contents to be visibly populated.
Largest Contentful Paint — 7.4 s
The timing of the largest text or image that is painted.
Time to Interactive — 18.5 s
The time taken for the page to become fully interactive.
Total Blocking Time — 2,070 ms
The total blocking time is the sum of all time periods between First Contentful Paint and Time to Interactive (when task length exceeded 50ms).

Other

First CPU Idle — 15.5 s
The time taken for the page's main thread to be quiet enough to handle input.
Max Potential First Input Delay — 1,230 ms
Users could experience a delay when interacting with the page.
First Meaningful Paint — 7.2 s
The time taken for the primary content of the page to be rendered.
Estimated Input Latency — 600 ms
The time taken for the page to respond to user input (during the busiest 5 second window of page load). Users are likely to perceive itmedia.co.jp as laggy when the latency is higher than 0.05 seconds.
First Contentful Paint (3G) — 10425 ms
The time taken for the first image or text on the page to be rendered while on a 3G network.

Opportunities

Remove unused JavaScript — Potential savings of 320 KiB
It is advised to remove unused JavaScript in order to reduce bytes consumed by network activity.
URL Transfer Size (Bytes) Potential Savings (Bytes)
https://j.microad.net/js/compass.js
168170
124795
https://connect.facebook.net/signals/config/185005748502834?v=2.9.27&r=stable
71190
53293
https://securepubads.g.doubleclick.net/gpt/pubads_impl_2020110401.js
100913
47739
https://connect.facebook.net/ja_JP/sdk.js?hash=3505d47c0be0c5df3446fb46042ceeaf&ua=modern_es6
61108
44218
https://cdn.ampproject.org/rtv/012010270040000/amp4ads-v0.js
58331
29585
https://static.adsafeprotected.com/main.gr.19.8.141.js
57911
27821
Avoid multiple page redirects — Potential savings of 3,930 ms
Redirects can cause additional delays before the page can begin loading. Itmedia.co.jp should avoid multiple or unnecessary page redirects.
URL Time Spent (Ms)
http://itmedia.co.jp/
630
http://www.itmedia.co.jp/
630
https://www.itmedia.co.jp/
2670
https://www.itmedia.co.jp/spv/
0

Diagnostics

Serve static assets with an efficient cache policy — 49 resources found
Itmedia.co.jp can speed up repeat visits by increasing the cache lifetime, which is essentially how long before a cached copy expires.
URL Cache TTL (Ms) Transfer Size (Bytes)
https://static.zucks.net.zimg.jp/image/2020/02/10/c/110915_phpolY1UG.jpeg
0
267429
https://static.zucks.net.zimg.jp/image/2020/02/10/c/110915_phpCyIkOt.jpeg
0
124936
https://s-rtb.send.microadinc.com/ad?spot=02d4d81f406b2b3e25e10fb1a66ced88&cb=microadCompass.AdRequestor.callback&url=https%3A%2F%2Fwww.itmedia.co.jp%2Fspv%2F&referrer=https%3A%2F%2Fwww.itmedia.co.jp%2F&cbt=3c5c190a0ecf100175b2584955
0
10467
https://s-rtb.send.microadinc.com/ad?spot=026e18e7d359d1b010dc11395bf6efa3&cb=microadCompass.AdRequestor.callback&url=https%3A%2F%2Fwww.itmedia.co.jp%2Fspv%2F&referrer=https%3A%2F%2Fwww.itmedia.co.jp%2F&cbt=d6d3ac85445cc80175b2584c4e
0
10215
https://yads.yjtag.yahoo.co.jp/tag?s=97383_120267&fr_id=yads_7741320-0&p_elem=yads-timeline-97383_120267-3941384&sb_support=1&enc=SHIFT_JIS&u=https%3A%2F%2Fwww.itmedia.co.jp%2Fspv%2F&ref=https%3A%2F%2Fwww.itmedia.co.jp%2F&async=1&mb=1&kwe=u&kwm=1&pv_id=50891295-595d-4851-adb0-543f338f1d05
0
817
https://s-cs.send.microad.jp/hs?k=criteo_hs&id=ed716966-9554-46c7-91d1-18a675fd9f6e
0
718
https://securepubads.g.doubleclick.net/pagead/adview?ai=CiEG6lJWqX7lp0t-fBP6mltAIgcblgWDei4aBtgywkB8QASDhkbQqYMmW8oq0pNgPoAGc98ujAsgBCakCSiOZbAlvRD7gAgCoAwHIAwqqBOkBT9CL4s1S9lcBKmZmOj4ducBfYo4mf_2Vczj_LSSi91VWcUPPfhOMEDcbC-cbb34meN3kypvw6-OuPGXgllGHkqfqtM3ZiME4lkmgYl2mhdWEwtfWyn9O9F-pS47lFT8oquV34xTEVxKi8K6AddzezSAeKitctkdlY2mEVXuSyXSunAvdl7nlVuBjmP_Kf_HXCdvrE1Y4CN7GJFipk6U-kcqzKxct1w8pn8rA2GK5FgpHeGjIxIIrBZsoh-luOYL3A_wEY6qfXZrMdJx1bbI70GEe-LVPwSF_MU4cxIUyM2frVSKQw0rznrDABOeQ1NmPA-AEAYgF_PnwhymSBQQIBBgBkgUECAUYBKAGLtgGAoAHzIi03AGoB9XJG6gH8NkbqAfy2RuoB47OG6gHk9gbqAe6BqgH7paxAqgHpr4bqAfs1RvYBwDyBwQQtrYNoAjvw6UEsAgC0ggJCIDhgEAQARgdgAoDyAsBsgwUcHViLTE3NTc3NDczMTI2Mjk5NDfCDAIIAdgTDYIUExoRd3d3Lml0bWVkaWEuY28uanCIFAI&sigh=aEObSrMlwFg&template_id=5000&tpd=AGWhJms4cinZ_0jF81u-HYPb2JLy_eQlHnfi3LiYfROgaSCIXg
0
641
https://aid.send.microad.jp/asr?v=1&code=s3E4IQ22DWc&format=pixel
0
625
https://aid.send.microad.jp/asr?v=1&code=XtrNLKLWme8&format=pixel
0
625
https://fc.itmedia.co.jp/fpcookie?site_id=itm_
0
613
https://in.treasuredata.com/js/v3/event/cx_segments/pageviews?api_key=10074%2Ff8a32fad2e11b3499ae935d855ff3bb51cbc592c&modified=1605014932347&data=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%2F44Or44CMSVRtZWRpYeOAjUhvbWUiLCJ0ZF9kZXNjcmlwdGlvbiI6IuODhuOCr%2BODjuODreOCuOODvOmWoumAo%2BOBruODi%2BODpeODvOOCueWPiuOBs%2BmAn%2BWgseOCkuS4reW%2Fg%2BOBq%2BOAgeODrOODk%2BODpeODvOOChOeJuembhuiomOS6i%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%3D%3D&callback=TreasureJSONPCallback0
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https://scomcluster.cxense.com/Repo/rep.gif?ver=1&typ=pgv&rnd=khc0g6gdxkck12d4&acc=0&sid=1139581027321622182&loc=https%3A%2F%2Fwww.itmedia.co.jp%2Fspv%2F&gol=&pgn=&new=0&arf=0&ltm=1605014930605&ref=https%3A%2F%2Fwww.itmedia.co.jp%2F&tzo=480&res=360x640&dpr=2.625&col=24&jav=0&bln=en-US&chs=Shift_JIS&cks=khc0g7rcjgq08ylz&ckp=khc0g6gn5nzatjer&glb=&wsz=360x640&cp_u_itm_vid=itm_bBSFNs4zsxKT85cGfcHw&cp_u_itm_ubid=&cp_itm_window_size_w_10=360&cp_itm_window_size_w_50=350&cp_itm_window_size_h_10=640&cp_itm_window_size_h_50=650&cp_itm_adpath=smartphone%2Ftop&cp_itm_adpath_2=smartphone&cp_itm_adpath_3=top&cp_itm_article_page=single&cp_newusersession=true&cp_inboundsession=www.itmedia.co.jp&fls=0&flv=&cst=hzlmirnguf4g35kz51iogv0j7
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469
https://ssp.send.microadinc.com/ic?ep=4X6qVlBbE24CLGG-xlUKMC6ApZNT54YwKvsFx__238QPcLlque_AffwI4WRiw6bQzrXIpHqZZ0NhNwi1mAz5aH-PkvGX3dygalA7kuXr0LmtZOl0rhlZhAZIkeh2gXdWOejYfXmEHWAW17bY2pyF_GZRi1JVKwC1oUzpaHNUPNpk
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https://ssp.send.microadinc.com/ic?ep=4X6qVlQmJaADN3ji98IrBGB_xossYgQCwHlU-Xc0UpjlNKkKfcu4Uo-5qL5SVKpzm-e3TYh_OcMxE3Ca672wsk8YnlLCj6NJmLZlErXPqJbe1aCuno5VK1Ma7g2cbzH2ZcygUgo1VLomQKJ7j876FZS31dIFD2Ca0v2gskHcJnJ4
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https://in.treasuredata.com/postback/v3/event/logly/sync?td_write_key=8151/6ea1714a3a4eaf6a07bd7e67d51a423827d37091&td_global_id=td_global_id&td_ip=td_ip&td_ua=td_ua&account=aws-us-10074&cid=6CTpAdsQLzheoDsZBMs-g3Ma9p8
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https://cx.api.itmedia.co.jp/v1.js
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https://tr.api.itmedia.jp/v1.js
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285
https://tr.api.itmedia.jp/v1.js
0
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https://yads.c.yimg.jp/js/yads-async.js
600000
20210
https://s.yimg.jp/images/listing/tool/yads/uadf/yads_vimps.js
600000
13269
https://s.yimg.jp/images/advertising/common/js/iicon.min.js
600000
5882
https://b92.yahoo.co.jp/js/s_retargeting.js
600000
3550
https://i.yimg.jp/images/listing/tool/yads/yads-timeline-ex.js
600000
2769
https://connect.facebook.net/signals/config/185005748502834?v=2.9.27&r=stable
1200000
71190
https://connect.facebook.net/en_US/fbevents.js
1200000
24356
https://connect.facebook.net/ja_JP/sdk.js
1200000
2681
https://scdn.cxense.com/cx.js
3600000
25225
https://scdn.cxense.com/cx.js
3600000
25225
https://www.google-analytics.com/analytics.js
7200000
19479
https://cs.nakanohito.jp/b3/bi.js
10800000
18768
https://fonts.gstatic.com/l/font?kit=-F6pfjtqLzI2JPCgQBnw7HFQMisq131nj-onjNhAitKggle_OSMX413nwUTMr7-RzI_PZJihXSLtqVznGb7qoTrp-3BC4agpHh4zClJGpMMQ_aahZpAhr7h52DrNy3ll4_R_4w7MuP4Ipo8E7Z5pdyZTJcF_j9pOyb7xDn0gqm9AYTFsh9ULha1FJ9PHvNNDa7qrW90qlJVWtnZgG0YCLD-1tWlyntxin4Tt-mmS5Ib8BEnFEQ&skey=fbc48de1c6e1b00c&v=v27
86400000
18463
https://fonts.gstatic.com/l/font?kit=-F62fjtqLzI2JPCgQBnw7HFowwII2ldXH-s1UZAym3hyV1e_OiMW5V3nykTMsL-RxY_PZ5ihYSLtqFznFb7qpDrp-nBC_qgpHx4zBVJFm8MQ9aahfZAhpLh52zrN8Hll5PR__A7Mu_4JiY8E7p5pdiZTG8F_i9pO177xCXsgk29LajFumtUMia1GL9Pks9NeebqiXN0pkpZmtXZNEEYMOD-tqGdij91EgoT89GmS74bzHw&skey=72472b0eb8793570&v=v27
86400000
18063
https://tpc.googlesyndication.com/pagead/images/abg/en.png
86400000
3639
https://tpc.googlesyndication.com/pagead/images/abg/icon.png
86400000
999
https://jgl.microad.net/js/compass.js
546639000
19962
https://img.itmedia.jp/so/images/sa/b/286/293870/300922891/240B_Sky2.jpg
604800000
17585
https://img.itmedia.jp/so/images/sa/b/286/293869/300921934/240A_sky1.jpg
604800000
15818
https://img.itmedia.jp/so/images/sa/b/286/293869/300921910/gtune_p5_240.jpg
604800000
12615
https://img.itmedia.jp/so/images/sa/b/286/293868/300921844/f4h32087h.jpg
604800000
9435
https://img.itmedia.jp/so/images/sa/b/286/293867/300920258/2401801.jpg
604800000
6821
https://img.itmedia.jp/so/images/sa/b/286/293870/300923162/yuudou240.jpg
604800000
5994
https://image.itmedia.co.jp/nl/articles/2011/10/top_news049.jpg
2592000000
8038
https://image.itmedia.co.jp/nl/articles/2011/10/top_news142.jpg
2592000000
3895
https://image.itmedia.co.jp/nl/articles/2011/10/top_news141.jpg
2592000000
3529
https://image.itmedia.co.jp/nl/articles/2011/10/top_news104.jpg
2592000000
2943
https://image.itmedia.co.jp/nl/articles/2011/10/top_news029.jpg
2592000000
2868
https://image.itmedia.co.jp/images/logo/spvheader_top.gif
2592000000
2049
https://image.itmedia.co.jp/spv/images/head_menu.gif
2592000000
1638
https://image.itmedia.co.jp/spv/images/author_update.png
2592000000
1058
Reduce JavaScript execution time — 6.3 s
JavaScript (JS) execution time can be lowered by reducing the time required for parsing, compiling and executing JS. Delivering smaller JS payloads may help with this.
URL Total CPU Time (Ms) Script Evaluation (Ms) Script Parse (Ms)
https://tpc.googlesyndication.com/sodar/sodar2/219/runner.html
1665.196
1605.536
10.136
https://static.adsafeprotected.com/sca.17.4.114.js
1266.748
1250.9
6.272
https://www.itmedia.co.jp/spv/
1107.32
297.076
29.692
https://securepubads.g.doubleclick.net/gpt/pubads_impl_2020110401.js
1034.576
449.452
97.428
Unattributable
826.212
15.624
0.96
https://cdn.ampproject.org/rtv/012010270040000/amp4ads-v0.js
642.708
442.26
21.196
https://scdn.cxense.com/cx.js
411.632
264.048
54.156
https://pixel.adsafeprotected.com/jload?anId=928886&ias_adpath=adsafe
245.276
229.392
8.46
https://www.googletagmanager.com/gtm.js?id=GTM-W3CLTQN
211.9
164.592
24.792
https://connect.facebook.net/signals/config/185005748502834?v=2.9.27&r=stable
156.94
132.66
17.156
https://s-rtb.send.microadinc.com/ad?spot=02d4d81f406b2b3e25e10fb1a66ced88&cb=microadCompass.AdRequestor.callback&url=https%3A%2F%2Fwww.itmedia.co.jp%2Fspv%2F&referrer=https%3A%2F%2Fwww.itmedia.co.jp%2F&cbt=3c5c190a0ecf100175b2584955
147.492
106.196
12.12
https://pagead2.googlesyndication.com/bg/NNBFmmTfMeJXqygf8DIqtKAQbNdjHZQ4KGfsPIMPfu8.js
112.884
103.5
7.748
https://www.google-analytics.com/analytics.js
110.14
86.232
15.872
https://static.adsafeprotected.com/main.gr.19.8.141.js
104.94
80.92
11.98
https://connect.facebook.net/ja_JP/sdk.js?hash=3505d47c0be0c5df3446fb46042ceeaf&ua=modern_es6
86.924
58.276
24.064
https://s-rtb.send.microadinc.com/ad?spot=026e18e7d359d1b010dc11395bf6efa3&cb=microadCompass.AdRequestor.callback&url=https%3A%2F%2Fwww.itmedia.co.jp%2Fspv%2F&referrer=https%3A%2F%2Fwww.itmedia.co.jp%2F&cbt=d6d3ac85445cc80175b2584c4e
77.744
55.976
7.64
https://dlv.itmedia.jp/adsv/v1?posall=TOPINF1&oe=shift_jis&nurl=https%3A//www.itmedia.co.jp/spv/&fp=root%2Fsmartphone%2Ftop&word=IT%2C%E3%83%8B%E3%83%A5%E3%83%BC%E3%82%B9%2C%E3%82%A8%E3%83%B3%E3%82%BF%E3%83%BC%E3%83%97%E3%83%A9%E3%82%A4%E3%82%BA%2C%E3%83%A2%E3%83%90%E3%82%A4%E3%83%AB%2C%E3%83%A9%E3%82%A4%E3%83%95%E3%82%B9%E3%82%BF%E3%82%A4%E3%83%AB%2CPC%2C%E3%82%B2%E3%83%BC%E3%83%A0%2Cblog&rnd=1605014931547&composite=1605014930588&ref=https%3A//www.itmedia.co.jp/&x-cxsegids=&t=js
73.828
61.68
5.968
https://cdn.treasuredata.com/sdk/1.9.2/td.min.js
73.516
60.456
9.276
https://www.googletagservices.com/tag/js/gpt.js
72.408
48.332
18.72
https://cs.nakanohito.jp/b3/bi.js
69.724
42.848
19.864
https://cache.send.microadinc.com/js/cookie_loader.html
62.74
31.172
6.148
https://tpc.googlesyndication.com/sodar/sodar2.js
60.712
49.744
7.032
https://www.googletagmanager.com/gtag/js?id=AW-1032582312
58.764
46.22
9.972
https://connect.facebook.net/en_US/fbevents.js
57.516
48.456
6.528
https://s.yimg.jp/images/listing/tool/yads/uadf/yads_vimps.js
52.452
31.904
12.604
https://yads.c.yimg.jp/js/yads-async.js
51.38
29.796
16.208
Minimize main-thread work — 9.4 s
Main-thread work timing can be lowered by reducing the time required for parsing, compiling and executing JS. Delivering smaller JS payloads may help with this.
Category Time Spent (Ms)
Script Evaluation
6038.1319999999
Other
1222.372
Style & Layout
924.976
Script Parsing & Compilation
616.292
Rendering
260.728
Parse HTML & CSS
244.236
Garbage Collection
131.724
Ensure text remains visible during webfont load
Make use of the font-display CSS feature, which will ensure text is user-visible while webfonts are loading.
URL Potential Savings (Ms)
https://fonts.gstatic.com/l/font?kit=-F6pfjtqLzI2JPCgQBnw7HFQMisq131nj-onjNhAitKggle_OSMX413nwUTMr7-RzI_PZJihXSLtqVznGb7qoTrp-3BC4agpHh4zClJGpMMQ_aahZpAhr7h52DrNy3ll4_R_4w7MuP4Ipo8E7Z5pdyZTJcF_j9pOyb7xDn0gqm9AYTFsh9ULha1FJ9PHvNNDa7qrW90qlJVWtnZgG0YCLD-1tWlyntxin4Tt-mmS5Ib8BEnFEQ&skey=fbc48de1c6e1b00c&v=v27
86.089999997057
https://fonts.gstatic.com/l/font?kit=-F6pfjtqLzI2JPCgQBnw7HFQaioq131nj-onjNhAitKggle_OSMX413nwUTMr7-RzI_PZJihXSLtqVznGb7qoTrp-3BC4agpHh4zClJGpMMQ_aahZpAhr7h52DrNy3ll4_R_4w7MuP4Ipo8E7Z5pdyZTJcF_j9pOyb7xDn0gqm9AYTFsh9ULha1FJ9PHvNNDa7qrW90qlJVWtnZgG0YCLD-1tWlyntxin4Tt-mmS5Ib8BEnFEQ&skey=f8a75aa314b1396f&v=v27
74.567000003299
https://fonts.gstatic.com/l/font?kit=-F62fjtqLzI2JPCgQBnw7HFowwII2ldXH-s1UZAym3hyV1e_OiMW5V3nykTMsL-RxY_PZ5ihYSLtqFznFb7qpDrp-nBC_qgpHx4zBVJFm8MQ9aahfZAhpLh52zrN8Hll5PR__A7Mu_4JiY8E7p5pdiZTG8F_i9pO177xCXsgk29LajFumtUMia1GL9Pks9NeebqiXN0pkpZmtXZNEEYMOD-tqGdij91EgoT89GmS74bzHw&skey=72472b0eb8793570&v=v27
41.649000020698
Reduce the impact of third-party code — Third-party code blocked the main thread for 2,810 ms
It is advised to either limit, remove or delay the loading of redundant third-party code which may be significantly impacting load performance.
Third-Party Transfer Size (Bytes) Main-Thread Blocking Time (Ms)
SHOW DETAILS
95308
1289.548
SHOW DETAILS
367251
1212.216
SHOW DETAILS
114979
119.148
SHOW DETAILS
57626
83.864
SHOW DETAILS
159798
55.392
SHOW DETAILS
20104
32.884
SHOW DETAILS
86698
11.832
SHOW DETAILS
14359
9.744
SHOW DETAILS
56241
0
SHOW DETAILS
42130
0
SHOW DETAILS
32960
0
SHOW DETAILS
1968
0
SHOW DETAILS
1680
0
SHOW DETAILS
1458
0
SHOW DETAILS
1057
0
SHOW DETAILS
0
0
Does not use passive listeners to improve scrolling performance
Improve the page's scroll performance by marking touch and wheel event listeners as 'passive'.
URL Location
https://www.itmedia.co.jp/js/spv/html5base.js?date=202002281825
line: 329
https://www.itmedia.co.jp/js/spv/html5base.js?date=202002281825
line: 335
https://www.itmedia.co.jp/js/spv/html5base_async.js?date=202007131025
line: 211
https://www.itmedia.co.jp/js/spv/html5base_async.js?date=202007131025
line: 212
Avoid `document.write()`
Avoid or limit the use of external scripts that are dynamically injected via 'document.write()' as users on slow connections will be delayed by tens of seconds.
URL Location
https://www.itmedia.co.jp/spv/
line: 157
https://www.itmedia.co.jp/js/spv/html5base.js?date=202002281825
line: 769
https://dlv.itmedia.jp/adsv/v1?posall=CBOX&oe=shift_jis&nurl=https%3A//www.itmedia.co.jp/spv/&fp=root%2Fsmartphone%2Ftop&word=IT%2C%E3%83%8B%E3%83%A5%E3%83%BC%E3%82%B9%2C%E3%82%A8%E3%83%B3%E3%82%BF%E3%83%BC%E3%83%97%E3%83%A9%E3%82%A4%E3%82%BA%2C%E3%83%A2%E3%83%90%E3%82%A4%E3%83%AB%2C%E3%83%A9%E3%82%A4%E3%83%95%E3%82%B9%E3%82%BF%E3%82%A4%E3%83%AB%2CPC%2C%E3%82%B2%E3%83%BC%E3%83%A0%2Cblog&rnd=1605014931281&composite=1605014930588&ref=https%3A//www.itmedia.co.jp/&x-cxsegids=&t=js
line: 0
https://dlv.itmedia.jp/adsv/v1?posall=CBOX&oe=shift_jis&nurl=https%3A//www.itmedia.co.jp/spv/&fp=root%2Fsmartphone%2Ftop&word=IT%2C%E3%83%8B%E3%83%A5%E3%83%BC%E3%82%B9%2C%E3%82%A8%E3%83%B3%E3%82%BF%E3%83%BC%E3%83%97%E3%83%A9%E3%82%A4%E3%82%BA%2C%E3%83%A2%E3%83%90%E3%82%A4%E3%83%AB%2C%E3%83%A9%E3%82%A4%E3%83%95%E3%82%B9%E3%82%BF%E3%82%A4%E3%83%AB%2CPC%2C%E3%82%B2%E3%83%BC%E3%83%A0%2Cblog&rnd=1605014931281&composite=1605014930588&ref=https%3A//www.itmedia.co.jp/&x-cxsegids=&t=js
line: 1
https://dlv.itmedia.jp/adsv/v1?posall=RECTANGL&oe=shift_jis&nurl=https%3A//www.itmedia.co.jp/spv/&fp=root%2Fsmartphone%2Ftop&word=IT%2C%E3%83%8B%E3%83%A5%E3%83%BC%E3%82%B9%2C%E3%82%A8%E3%83%B3%E3%82%BF%E3%83%BC%E3%83%97%E3%83%A9%E3%82%A4%E3%82%BA%2C%E3%83%A2%E3%83%90%E3%82%A4%E3%83%AB%2C%E3%83%A9%E3%82%A4%E3%83%95%E3%82%B9%E3%82%BF%E3%82%A4%E3%83%AB%2CPC%2C%E3%82%B2%E3%83%BC%E3%83%A0%2Cblog&rnd=1605014931640&composite=1605014930588&ref=https%3A//www.itmedia.co.jp/&x-cxsegids=&t=js
line: 0
https://dlv.itmedia.jp/adsv/v1?posall=RECTANGL&oe=shift_jis&nurl=https%3A//www.itmedia.co.jp/spv/&fp=root%2Fsmartphone%2Ftop&word=IT%2C%E3%83%8B%E3%83%A5%E3%83%BC%E3%82%B9%2C%E3%82%A8%E3%83%B3%E3%82%BF%E3%83%BC%E3%83%97%E3%83%A9%E3%82%A4%E3%82%BA%2C%E3%83%A2%E3%83%90%E3%82%A4%E3%83%AB%2C%E3%83%A9%E3%82%A4%E3%83%95%E3%82%B9%E3%82%BF%E3%82%A4%E3%83%AB%2CPC%2C%E3%82%B2%E3%83%BC%E3%83%A0%2Cblog&rnd=1605014931640&composite=1605014930588&ref=https%3A//www.itmedia.co.jp/&x-cxsegids=&t=js
line: 1
https://dlv.itmedia.jp/adsv/v1?posall=RECTANGL&oe=shift_jis&nurl=https%3A//www.itmedia.co.jp/spv/&fp=root%2Fsmartphone%2Ftop&word=IT%2C%E3%83%8B%E3%83%A5%E3%83%BC%E3%82%B9%2C%E3%82%A8%E3%83%B3%E3%82%BF%E3%83%BC%E3%83%97%E3%83%A9%E3%82%A4%E3%82%BA%2C%E3%83%A2%E3%83%90%E3%82%A4%E3%83%AB%2C%E3%83%A9%E3%82%A4%E3%83%95%E3%82%B9%E3%82%BF%E3%82%A4%E3%83%AB%2CPC%2C%E3%82%B2%E3%83%BC%E3%83%A0%2Cblog&rnd=1605014931640&composite=1605014930588&ref=https%3A//www.itmedia.co.jp/&x-cxsegids=&t=js
line: 2
https://dlv.itmedia.jp/adsv/v1?posall=5FTDMP&oe=shift_jis&nurl=https%3A//www.itmedia.co.jp/spv/&fp=root%2Fsmartphone%2Ftop&word=IT%2C%E3%83%8B%E3%83%A5%E3%83%BC%E3%82%B9%2C%E3%82%A8%E3%83%B3%E3%82%BF%E3%83%BC%E3%83%97%E3%83%A9%E3%82%A4%E3%82%BA%2C%E3%83%A2%E3%83%90%E3%82%A4%E3%83%AB%2C%E3%83%A9%E3%82%A4%E3%83%95%E3%82%B9%E3%82%BF%E3%82%A4%E3%83%AB%2CPC%2C%E3%82%B2%E3%83%BC%E3%83%A0%2Cblog&rnd=1605014931816&composite=1605014930588&ref=https%3A//www.itmedia.co.jp/&x-cxsegids=&t=js
line: 0
https://dlv.itmedia.jp/adsv/v1?posall=5FTDMP&oe=shift_jis&nurl=https%3A//www.itmedia.co.jp/spv/&fp=root%2Fsmartphone%2Ftop&word=IT%2C%E3%83%8B%E3%83%A5%E3%83%BC%E3%82%B9%2C%E3%82%A8%E3%83%B3%E3%82%BF%E3%83%BC%E3%83%97%E3%83%A9%E3%82%A4%E3%82%BA%2C%E3%83%A2%E3%83%90%E3%82%A4%E3%83%AB%2C%E3%83%A9%E3%82%A4%E3%83%95%E3%82%B9%E3%82%BF%E3%82%A4%E3%83%AB%2CPC%2C%E3%82%B2%E3%83%BC%E3%83%A0%2Cblog&rnd=1605014931816&composite=1605014930588&ref=https%3A//www.itmedia.co.jp/&x-cxsegids=&t=js
line: 1
https://dlv.itmedia.jp/adsv/v1?posall=10FEATURES&oe=shift_jis&nurl=https%3A//www.itmedia.co.jp/spv/&fp=root%2Fsmartphone%2Ftop&word=IT%2C%E3%83%8B%E3%83%A5%E3%83%BC%E3%82%B9%2C%E3%82%A8%E3%83%B3%E3%82%BF%E3%83%BC%E3%83%97%E3%83%A9%E3%82%A4%E3%82%BA%2C%E3%83%A2%E3%83%90%E3%82%A4%E3%83%AB%2C%E3%83%A9%E3%82%A4%E3%83%95%E3%82%B9%E3%82%BF%E3%82%A4%E3%83%AB%2CPC%2C%E3%82%B2%E3%83%BC%E3%83%A0%2Cblog&rnd=1605014931992&composite=1605014930588&ref=https%3A//www.itmedia.co.jp/&x-cxsegids=&t=js
line: 0
https://securepubads.g.doubleclick.net/gpt/pubads_impl_2020110401.js
line: 5
https://j.microad.net/js/compass.js
line: 1
https://static.adsafeprotected.com/main.gr.19.8.141.js
line: 345
51

Accessibility

Indicates how accessible the page is and highlights opportunities where the page can be made more accessible to users of itmedia.co.jp. This includes details about various page attributes that can be optimized.

Navigation

`[accesskey]` values are unique
Access keys assist users with focusing on different parts of the page. Each access key should be unique for proper navigation.
The page contains a heading, skip link, or landmark region
It is advised to provide ways to bypass repetitive content, allowing users to navigate the page efficiently.
`[id]` attributes on active, focusable elements are unique
Ensure all focusable elements have a unique id value to allow them to be visible to users of assistive technologies, like a screen reader.
Heading elements appear in a sequentially-descending order
Properly order all headers and do not skip heading levels to better the navigation and readability for users of assistive technologies, like a screen reader.
No element has a `[tabindex]` value greater than 0
Although technically valid, a tabindex value greater than 0 often creates frustrating experiences for users who rely on assistive technologies.

ARIA

`[aria-*]` attributes match their roles
Avoid mismatching 'aria-*' attributes and their 'role' value, as it invalidates the attribute.
`[aria-hidden="true"]` is not present on the document `<body>`
If aria-hidden=true is set on the document body, assistive technologies, like a screen reader will work inconsistently.
`[aria-hidden="true"]` elements do not contain focusable descendents
Interactive elements within an aria-hidden=true element are unavailable to users of assistive technologies, like a screen reader.
ARIA input fields have accessible names
Generic names are announced to users of assistive technologies, like a screen reader, when an input field does not have an accessible name specified.
`[role]`s have all required `[aria-*]` attributes
Some ARIA roles have required 'aria-*' attributes, which provide essential information about state and functionality.
Elements with an ARIA `[role]` that require children to contain a specific `[role]` have all required children.
Some ARIA parent roles cannot perform their intended functions if specific child roles are not used.
`[role]`s are contained by their required parent element
Some ARIA child roles cannot perform their intended functions if specific parent roles are not used.
`[role]` values are valid
All ARIA roles require valid values to perform their intended functions.
ARIA toggle fields have accessible names
Generic names are announced to users of assistive technologies, like a screen reader, when a toggle field does not have an accessible name specified.
`[aria-*]` attributes have valid values
ARIA attributes cannot be interpreted with invalid values when used by screen readers and other assistive technologies.
`[aria-*]` attributes are valid and not misspelled
ARIA attributes cannot be interpreted with invalid names when used by screen readers and other assistive technologies.
ARIA IDs are unique
Ensure all ARIA ID values are unique to prevent elements from being overlooked by assistive technologies, like a screen reader.

Names and labels

Buttons have an accessible name
Buttons become unusable as they are announced simply as "button" when the button does not have an accessible name, when used by screen readers and other assistive technologies.
Document has a `<title>` element
Search engines, screen reader users and other assistive technology users rely on the title to provide an overview of the page and to help determine if the page is relevant to their search.
No form fields have multiple labels
Having multiple labels for form fields can be confusing to assistive technologies, like a screen reader.
`<input type="image">` elements have `[alt]` text
Input buttons with alternative text assist screen readers and other assistive technology users to understand its purpose.
Form elements have associated labels
Screen readers and other assistive technologies rely on labels to properly announce form controls.
`<object>` elements have `[alt]` text
It is advised that alt text is used on '<object>' elements in order to provide meaning to screen reader and other assistive technology users, as these technologies are unable to translate non-text content.

Contrast

Background and foreground colors have a sufficient contrast ratio
Many (if not most) users find low-contrast text difficult or impossible to read.

Tables and lists

`<dl>`'s contain only properly-ordered `<dt>` and `<dd>` groups, `<script>`, `<template>` or `<div>` elements.
Screen readers and other assistive technologies may produce poor and inaccurate output when definition lists are not properly marked up.
Definition list items are wrapped in `<dl>` elements
In order for screen readers and other assistive technologies to properly announce definition list items ('<dt>' and '<dd>'), they must be wrapped in parent a '<dl>' element.
Presentational `<table>` elements avoid using `<th>`, `<caption>` or the `[summary]` attribute.
It is advised to not include data elements in tables which are used for layout purposes, as it may create confusion for screen reader and other assistive technology users.
Lists contain only `<li>` elements and script supporting elements (`<script>` and `<template>`).
Use proper list structure to aid screen readers and other assistive technologies.
List items (`<li>`) are contained within `<ul>` or `<ol>` parent elements
In order for screen readers to announce list items, ensure that list items ('<li>') are contained within parent '<ul>' or '<ol>' tags.
Cells in a `<table>` element that use the `[headers]` attribute refer to table cells within the same table.
Screen readers and other assistive technologies have features to make navigating tables easier. Ensure that '<td>' cells using the headers attribute only refer to other cells in the same table, to improve screen reader user experience.
`<th>` elements and elements with `[role="columnheader"/"rowheader"]` have data cells they describe.
Screen readers and other assistive technologies have features to make navigating tables easier. Ensure that table headers refer to some set of cells, to improve screen reader user experience.

Internationalization and localization

`<html>` element has a `[lang]` attribute
It is advised to provide a lang attribute so that screen readers and other assistive technologies are guaranteed to announce the page's text correctly. When not provided, the user's default language setting will be used which may cause inaccuracies.
`<html>` element has a valid value for its `[lang]` attribute
Specify a valid BCP 47 language in order to help screen readers and other assistive technologies announce text properly.
`[lang]` attributes have a valid value
Specify a valid BCP 47 language on elements in order to help screen readers and other assistive technologies announce text properly.

Best practices

The document does not use `<meta http-equiv="refresh">`
Pages that refresh automatically cause a poor user experience as focus is directed back to the top of the page unexpectedly.

Audio and video

`<video>` elements contain a `<track>` element with `[kind="captions"]`
Itmedia.co.jp may provide assistance to deaf or hearing-impaired users with captions on videos.
`<video>` elements contain a `<track>` element with `[kind="description"]`
Itmedia.co.jp may provide relevant information that dialogue cannot, by using audio descriptions.

Names and labels

`<frame>` or `<iframe>` elements do not have a title
Screen reader users and other assistive technology users rely on frame titles to describe the contents of frames.
Failing Elements
iframe
iframe
iframe
iframe
Image elements do not have `[alt]` attributes
Provide short and descriptive alternative text where possible on informative elements.
Failing Elements
img
img
img
img
img
img
Links do not have a discernible name
In order to improve the navigation for screen reader and other assistive technology users, use link text that is unique, focusable and discernible.

Best practices

`[user-scalable="no"]` is used in the `<meta name="viewport">` element or the `[maximum-scale]` attribute is less than 5.
For users with low vision who rely on screen magnification, ensure that zooming is not disabled.
Failing Elements
meta

Manual Checks

The page has a logical tab order
The visual layout should be logical in its tab order and users cannot focus elements that are offscreen.
Interactive controls are keyboard focusable
Ensure that custom interactive controls are keyboard focusable and that a focus indicator is displayed.
Interactive elements indicate their purpose and state
Ensure that interactive elements (such as links and buttons) are distinguishable from non-interactive elements and that they indicate their state.
The user's focus is directed to new content added to the page
When new content (such as a dialogue) is added to the page, the user's focus should be directed to it.
User focus is not accidentally trapped in a region
Avoid focus being accidentally trapped when a user tabs in and out of controls or regions on page.
Custom controls have associated labels
Ensure that custom interactive controls have associated labels, which are provided by aria-label and aria-labelledby attributes.
Custom controls have ARIA roles
Ensure that all custom interactive controls have appropriate ARIA roles.
Visual order on the page follows DOM order
Ensure that the DOM order matches with the page's visual order, in order to improve navigation for screen readers and other assistive technologies.
Offscreen content is hidden from assistive technology
Ensure that offscreen content is hidden through the use of "display:none" styling or the aria-hidden attribute.
HTML5 landmark elements are used to improve navigation
Elements such as <main> and <nav> are recommended as they are used by screen readers and other assistive technologies to improve keyboard navigation.
71

Best Practices

Indicates the recommended, best practices currently in place on the page and highlights the best practices that itmedia.co.jp should incorporate. This includes practices such as protecting pages with HTTPS.

Audits

Links to cross-origin destinations are safe
Improve performance and prevent security vulnerabilities by adding rel="noopener" and rel="noreferrer" to external links.
Avoids requesting the geolocation permission on page load
When requesting a user's location, provide context or consider tying the request to a user action to avoid confusion and mistrust from users.
Avoids requesting the notification permission on page load
When requesting permission to send notifications, provide context or consider tying the request to a user action to avoid confusion and mistrust from users.
Avoids front-end JavaScript libraries with known security vulnerabilities
Ensure that the use of third-party scripts is minimal and that only trusted third-party scripts are used as some may contain known security vulnerabilities which may be exploited by attackers.

Audits

Allows users to paste into password fields
Ensure that password inputs may be pasted into to aid in the user's ability to use password managers and improve security.
Displays images with correct aspect ratio
Ensure that image display dimensions match their natural aspect ratio.
Serves images with appropriate resolution
For maximum image clarity, ensure images have natural dimensions and are proportional to the display size and pixel ratio.
Fonts with `font-display: optional` are preloaded
It is recommended that optional fonts are preloaded.

Audits

Page has the HTML doctype
Ensure a doctype is specified to prevent the browser from switching to quirks-mode.
Properly defines charset
It is advised to declare a character encoding, optionally via a <meta> tag in the first 1024 bytes of the HTML or in the Content-Type HTTP response header.

Audits

Avoids Application Cache
Application cache is deprecated and is no longer recommended.
Detected JavaScript libraries
Below is a list of all front-end JavaScript libraries that were detected on the page.
Name Version
core-js
3.0.0: pure
Page has valid source maps
Consider deploying source maps for added benefits such as the ability to debug while in production.
URL Map URL
https://scdn.cxense.com/cx.js
https://scdn.cxense.com/cx.js.map
https://scdn.cxense.com/cx.js
https://scdn.cxense.com/cx.js.map
https://cdn.ampproject.org/rtv/012010270040000/v0/amp-form-0.1.js
https://cdn.ampproject.org/rtv/012010270040000/v0/amp-form-0.1.js.map
https://cdn.ampproject.org/rtv/012010270040000/v0/amp-fit-text-0.1.js
https://cdn.ampproject.org/rtv/012010270040000/v0/amp-fit-text-0.1.js.map
https://cdn.ampproject.org/rtv/012010270040000/v0/amp-analytics-0.1.js
https://cdn.ampproject.org/rtv/012010270040000/v0/amp-analytics-0.1.js.map
https://cdn.ampproject.org/rtv/012010270040000/v0/amp-ad-exit-0.1.js
https://cdn.ampproject.org/rtv/012010270040000/v0/amp-ad-exit-0.1.js.map
https://cdn.ampproject.org/rtv/012010270040000/amp4ads-v0.js
https://cdn.ampproject.org/rtv/012010270040000/amp4ads-v0.js.map

Audits

Does not use HTTPS — 2 insecure requests found
Ensure that all pages are protected with HTTPS (including those that do not handle sensitive data) as HTTPS prevents tampering and passive listening on communications between the app and its users. Additionally, HTTPS is a prerequisite for HTTP/2 and many new web platform APIs.
Insecure URL
http://itmedia.co.jp/
http://www.itmedia.co.jp/

Audits

Registers an `unload` listener
The 'unload' event does not fire reliably, causing issues with browser optimizations such as the Back-Forward Cache. It is recommended that 'pagehide' or 'visibilitychange' events are used instead.
URL
SHOW DETAILS
SHOW DETAILS
SHOW DETAILS
Uses deprecated APIs — 1 warning found
Avoid deprecated APIs which will eventually be removed the browser.
Deprecation / Warning URL
Application Cache API use is deprecated and will be removed in M85, around August 2020. See https://www.chromestatus.com/features/6192449487634432 for more details.
SHOW DETAILS
Browser errors were logged to the console
Below is a list of all errors logged to the console, which indicate unresolved problems on the site.
URL Description
https://bs.nakanohito.jp/b3/
Failed to load resource: net::ERR_BLOCKED_BY_CLIENT.Inspector
https://www.facebook.com/tr/
Failed to load resource: net::ERR_BLOCKED_BY_CLIENT.Inspector
86

SEO

Indicates how well the page is optimized for ranking in search engines and highlights Search Engine Optimization (SEO) opportunities for itmedia.co.jp. This includes optimizations such as providing meta data.

Mobile Friendly

Has a `<meta name="viewport">` tag with `width` or `initial-scale`
It is advised to use a '<meta name="viewport">' tag for the optimization of itmedia.co.jp on mobile screens.
Document uses legible font sizes — 83.29% legible text
Font sizes of 12px or less are too small to most mobile users without user gestures and further action. Aim for more than 60% of page text to use font sizes greater than 12px.
Source Selector % of Page Text Font Size
SHOW DETAILS
abbr, address, article, aside, audio, b, blockquote, body, canvas, caption, cite, code, dd, del, details, dfn, div, dl, dt, em, fieldset, figcaption, figure, footer, form, h1, h2, h3, h4, h5, h6, header, hgroup, html, i, iframe, img, ins, kbd, label, legend, li, mark, menu, nav, object, ol, p, pre, q, samp, section, small, span, strong, summary, table, tbody, td, tfoot, th, thead, time, tr, ul, var, video
9.20%
10px
SHOW DETAILS
a
5.57%
10.23px
SHOW DETAILS
#microad_compass_a00d295dcc8f4d97e825af565811a056 .microad_compass_advertiser
0.54%
10px
SHOW DETAILS
#microad_compass_a00d295dcc8f4d97e825af565811a056 .microad_compass_advertiser
0.54%
10px
SHOW DETAILS
#microad_compass_a00d295dcc8f4d97e825af565811a056 .microad_compass_disclosure a
0.37%
10px
SHOW DETAILS
#microad_compass_a00d295dcc8f4d97e825af565811a056 .microad_compass_disclosure a
0.37%
10px
SHOW DETAILS
0.12%
< 12px
SHOW DETAILS
83.29%
≥ 12px
Tap targets are sized appropriately — 100% appropriately sized tap targets
Interactive elements (such as buttons and links) should be appropriately spaced, sized and easy enough to select or tap with regard to their surrounding elements.

Content Best Practices

Document has a `<title>` element
Search engines, screen reader users and other assistive technology users rely on the title to provide an overview of the page and to help determine if the page is relevant to their search.
Document has a meta description
Meta descriptions may be used by search engines when displaying a link to the page and should concisely summarize the page's content.
Links have descriptive text
Make use of descriptive link text to assist search engines in understanding the content.
Document has a valid `hreflang`
Search engines can be instructed to list specific versions of a page for a given language or region through the use of hreflang links.
Document avoids plugins
The content of plugins cannot be indexed by search engines and many devices either restrict or do not support them.

Crawling and Indexing

Page has successful HTTP status code
Avoid pages with unsuccessful HTTP status codes as they may not be indexed by search engines.
Links are crawlable
Ensure that the 'href' attribute of anchor elements links to the appropriate destination. This allows for more pages of the site to be discovered by search engines.
Page isn’t blocked from indexing
Pages that cannot be crawled by search engines cannot be indexed or included in their search results. Ensure that search engines have permission to crawl all pages that should be indexed.
robots.txt is valid
Malformed robots.txt files prevent crawlers from understanding how a site wants to be crawled or indexed, which can be devastating to SEO.

Content Best Practices

Image elements do not have `[alt]` attributes
Provide short and descriptive alternative text where possible on informative elements.
Failing Elements
img
img
img
img
img
img
Document does not have a valid `rel=canonical`
Search engines can be suggested which URL should be shown in search results through the use of canonical links.

Manual Checks

Structured data is valid
Structured data can be validated through the use of the Structured Data Testing Tool and the Structured Data Linter.
25

Progressive Web App

Indicates how valid the aspects of a Progressive Web App (PWA) are for the page and highlights opportunities to enable/improve the PWA of itmedia.co.jp. This includes details about web app manifests.

PWA Optimized

Redirects HTTP traffic to HTTPS
It is advised to redirect all HTTP traffic to HTTPS, in order to enable secure web features for all users.
Content is sized correctly for the viewport
Ensure that the width of the app's content matches the width of the viewport, otherwise the app might not be optimized for mobile screens.
Has a `<meta name="viewport">` tag with `width` or `initial-scale`
It is advised to use a '<meta name="viewport">' tag for the optimization of itmedia.co.jp on mobile screens.
Contains some content when JavaScript is not available
Apps should display alternative content for when JavaScript is disabled.
Provides a valid `apple-touch-icon`
iOS users of Progressive Web Apps will benefit from an apple touch icon, which can be defined with 'apple-touch-icon', which must point to a non-transparent 192px (or 180px) square PNG.

Fast and reliable

Page load is not fast enough on mobile networks — Interactive at 18.5 s
Ensure that the page loads fast enough over a cellular network, to ensure good mobile user experience.
Current page does not respond with a 200 when offline
In order for Progressive Web Apps to be made available offline, ensure that the app is using a service worker.
`start_url` does not respond with a 200 when offline
Consider using a service worker for Progressive Web Apps to ensure greater reliability for the user, in the case of poor network conditions.

Installable

Does not use HTTPS — 2 insecure requests found
Ensure that all pages are protected with HTTPS (including those that do not handle sensitive data) as HTTPS prevents tampering and passive listening on communications between the app and its users. Additionally, HTTPS is a prerequisite for HTTP/2 and many new web platform APIs.
Insecure URL
http://itmedia.co.jp/
http://www.itmedia.co.jp/
Does not register a service worker that controls page and `start_url`
A service worker is used to provide Progressive Web Apps the use of features such as working offline, the ability for the app to be added to the homescreen as well as push notifications.
Web app manifest does not meet the installability requirements
User engagement may be increased by leveraging the browsers ability to proactively prompt users to add the app to their homescreen.
View Data

PWA Optimized

Is not configured for a custom splash screen
Themed splash screens ensure a high-quality user experience at launch for app users.
View Data
Does not set a theme color for the address bar.
A theme may be applied to the browser address bar, which ideally can be made to match the site.
View Data
Manifest doesn't have a maskable icon
Maskable icons are great to ensure that images fill the entire shape when installing the app on a device.

Manual Checks

Site works cross-browser
Ensure that the Progressive Web App works correctly across every major browser.
Page transitions don't feel like they block on the network
Users perceive apps with responsive, snappy transitions as higher peforming and ensures a great user experience, even on a slow network.
Each page has a URL
Ensure that all pages are deep linkable via URL. They should also be unique for the purpose of shareability on social media.
Hosting

Server Location

Server IP Address: 3.112.117.223
Continent: Asia
Country: Japan
Japan Flag
Region: Tokyo
City: Tokyo
Longitude: 139.7532
Latitude: 35.6882
Currencies: JPY
Languages: Japanese

Web Hosting Provider

Name IP Address
Amazon Data Services Japan
Registration

Domain Registrant

Private Registration: No
Name:
Organization:
Country:
City:
State:
Post Code:
Email:
Phone:
Note: Registration information is derived from various sources and may be inaccurate.

Domain Registrar

Security

Visitor Safety

Mature Content: Not Likely
McAfee WebAdvisor Rating: Safe
WOT Rating: 4.5/5
WOT Trustworthiness: 89/100
WOT Child Safety: 89/100
Note: Safety information is not guaranteed.

SSL/TLS Certificate

Issued To: www.itmedia.co.jp
Issued By: Cybertrust Japan SureServer EV CA G3
Valid From: 24th September, 2020
Valid To: 23rd October, 2021
Subject: CN = www.itmedia.co.jp
O = ITmedia Inc.
L = Chiyoda-ku
S = JP
Hash: eed5b418
Issuer: CN = Cybertrust Japan SureServer EV CA G3
O = Cybertrust Japan Co., Ltd.
S = JP
Version: 2
Serial Number: 0x0348CEA395F2AC841C98CC5938EF08AFFAF4119C
Serial Number (Hex): 0348CEA395F2AC841C98CC5938EF08AFFAF4119C
Valid From: 24th September, 2024
Valid To: 23rd October, 2024
Signature Algorithm (Short Name): RSA-SHA256
Signature Algorithm (Long Name): sha256WithRSAEncryption
Authority Key Identifier: keyid:82:6C:75:5D:53:F5:45:69:BC:25:2D:A4:4C:89:E6:B2:B7:41:87:A3
Extended Key Usage: TLS Web Server Authentication, TLS Web Client Authentication
CRL Distribution Points:
Full Name:
URI:http://crl.cybertrust.ne.jp/SureServer/evcag3/cdp.crl
Certificate Policies: Policy: 1.2.392.200091.100.721.1
Policy: 2.23.140.1.1
Policy: 1.2.392.200081.1.22.1
CPS: https://www.cybertrust.ne.jp/ssl/repository/index.html
Authority Information Access: OCSP - URI:http://evocsp.cybertrust.ne.jp/OcspServer
CA Issuers - URI:http://crl.cybertrust.ne.jp/SureServer/evcag3/evcag3.crt
SCT List: Signed Certificate Timestamp:
Version : v1 (0x0)
Log ID : F6:5C:94:2F:D1:77:30:22:14:54:18:08:30:94:56:8E:
E3:4D:13:19:33:BF:DF:0C:2F:20:0B:CC:4E:F1:64:E3
Timestamp : Sep 24 03:15:22.135 2020 GMT
Extensions: none
Signature : ecdsa-with-SHA256
30:46:02:21:00:89:7B:BC:5E:FD:A7:42:81:C4:43:21:
00:D9:D2:FA:2F:A4:A5:45:42:19:7C:4D:DE:5F:58:CF:
F1:34:E9:99:A3:02:21:00:CB:CB:60:4C:65:F2:5D:5E:
03:17:50:2E:E5:78:07:92:D8:23:49:44:F6:66:0E:11:
79:B3:D9:BB:A9:C8:A7:5D
Signed Certificate Timestamp:
Version : v1 (0x0)
Log ID : 7D:3E:F2:F8:8F:FF:88:55:68:24:C2:C0:CA:9E:52:89:
79:2B:C5:0E:78:09:7F:2E:6A:97:68:99:7E:22:F0:D7
Timestamp : Sep 24 03:15:24.011 2020 GMT
Extensions: none
Signature : ecdsa-with-SHA256
30:45:02:21:00:A0:D4:8D:E4:8D:89:7A:41:03:B4:66:
12:C5:1D:9D:DD:05:86:C0:B3:B1:06:3E:14:09:83:9F:
BC:C7:1F:70:5F:02:20:3C:BC:08:6A:BE:28:62:B3:48:
C4:6C:60:08:1C:7C:76:17:EE:2B:69:38:FF:71:8C:1D:
FA:78:C4:F5:E3:FD:5A
Signed Certificate Timestamp:
Version : v1 (0x0)
Log ID : 44:94:65:2E:B0:EE:CE:AF:C4:40:07:D8:A8:FE:28:C0:
DA:E6:82:BE:D8:CB:31:B5:3F:D3:33:96:B5:B6:81:A8
Timestamp : Sep 24 03:15:27.903 2020 GMT
Extensions: none
Signature : ecdsa-with-SHA256
30:46:02:21:00:CF:4E:7E:B9:B4:BD:C1:52:9D:13:39:
53:B6:DC:3A:73:66:BD:34:34:74:DC:78:B1:2B:FE:11:
F9:FC:15:6B:E1:02:21:00:F3:7D:FA:E1:EA:3A:90:59:
77:6E:6C:68:43:3F:BE:9E:D0:B0:F5:EC:FE:01:3A:EA:
FE:FC:54:7F:AD:DA:DE:C3
Signed Certificate Timestamp:
Version : v1 (0x0)
Log ID : 5C:DC:43:92:FE:E6:AB:45:44:B1:5E:9A:D4:56:E6:10:
37:FB:D5:FA:47:DC:A1:73:94:B2:5E:E6:F6:C7:0E:CA
Timestamp : Sep 24 03:15:25.239 2020 GMT
Extensions: none
Signature : ecdsa-with-SHA256
30:45:02:20:4C:04:19:73:2E:9D:7F:7B:D7:3D:24:5C:
D7:D2:69:D5:63:32:50:45:7B:1A:EF:62:B3:96:F6:18:
91:76:F3:4F:02:21:00:EB:E3:CC:63:41:34:99:23:6B:
AC:D0:CE:D9:03:78:17:E4:29:59:64:B1:01:E7:B3:32:
80:1E:E0:9A:30:59:3C
Key Usage: Digital Signature, Key Encipherment
Basic Constraints: CA:FALSE
Subject Alternative Name: DNS:blogs.itmedia.co.jp
DNS:built.itmedia.co.jp
DNS:ednjapan.com
DNS:el.jibun.atmarkit.co.jp
DNS:image.itmedia.co.jp
DNS:jibun.atmarkit.co.jp
DNS:job.atmarkit.co.jp
DNS:mag.executive.itmedia.co.jp
DNS:marketing.itmedia.co.jp
DNS:monoist.atmarkit.co.jp
DNS:nlab.itmedia.co.jp
DNS:release.itmedia.co.jp
DNS:research.image.itmedia.co.jp
DNS:www.atmarkit.co.jp
DNS:www.keyman.or.jp
DNS:www.itmedia.co.jp
Technical

DNS Lookup

A Records

Host IP Address Class TTL
itmedia.co.jp. 3.112.117.223 IN 59
itmedia.co.jp. 54.150.183.245 IN 59

NS Records

Host Nameserver Class TTL
itmedia.co.jp. ns-1227.awsdns-25.org. IN 299
itmedia.co.jp. ns-1806.awsdns-33.co.uk. IN 299
itmedia.co.jp. ns-909.awsdns-49.net. IN 299
itmedia.co.jp. ns-99.awsdns-12.com. IN 299

MX Records

Priority Host Server Class TTL
10 itmedia.co.jp. anymx02.itmedia.co.jp. IN 299

SOA Records

Domain Name Primary NS Responsible Email TTL
itmedia.co.jp. ns-99.awsdns-12.com. awsdns-hostmaster.amazon.com. 899

TXT Records

Host Value Class TTL
itmedia.co.jp. pardot_291242_*=9f9ade131ab0deaadeb93b0e0256e74ac2c0f00e3142e8579c012715c5054dc1 IN 299
itmedia.co.jp. v=spf1 IN 299

HTTP Response Headers

HTTP-Code: HTTP/1.1 200 OK
Date: 10th November, 2020
Content-Type: text/html
Server: nginx
Expires: 10th November, 2020
Cache-Control: max-age=900
Connection: keep-alive
Vary: Accept-Encoding,User-Agent
Strict-Transport-Security: max-age=31536000

Whois Lookup

Created:
Changed:
Expires:
Status:
Nameservers: ns-1227.awsdns-25.org
ns-1806.awsdns-33.co.uk
ns-909.awsdns-49.net
ns-99.awsdns-12.com
Owner Organization: ITmedia Inc.
Full Whois: [ JPRS database provides information on network administration. Its use is ]
[ restricted to network administration purposes. For further information, ]
[ use 'whois -h whois.jprs.jp help'. To suppress Japanese output, add'/e' ]
[ at the end of command, e.g. 'whois -h whois.jprs.jp xxx/e'. ]

Domain Information: [ドメイン情報]
a. [ドメイン名] ITMEDIA.CO.JP
e. [そしきめい] あいてぃめでぃあかぶしきがいしゃ
f. [組織名] アイティメディア株式会社
g. [Organization] ITmedia Inc.
k. [組織種別] 株式会社
l. [Organization Type] corporation
m. [登録担当者] TO33334JP
n. [技術連絡担当者] YN42899JP
p. [ネームサーバ] ns-99.awsdns-12.com
p. [ネームサーバ] ns-1806.awsdns-33.co.uk
p. [ネームサーバ] ns-1227.awsdns-25.org
p. [ネームサーバ] ns-909.awsdns-49.net
s. [署名鍵]
[状態] Connected (2021/06/30)
[登録年月日] 2005/06/13
[接続年月日] 2005/06/13
[最終更新] 2020/07/01 01:07:51 (JST)

View Raw Whois

Nameservers

Name IP Address
ns-1227.awsdns-25.org 205.251.196.203
ns-1806.awsdns-33.co.uk 205.251.199.14
ns-909.awsdns-49.net 205.251.195.141
ns-99.awsdns-12.com 205.251.192.99
Related

Subdomains

Domain Subdomain
gamez.itmedia.co.jp
gamez
techtarget.itmedia.co.jp
techtarget
zenback.itmedia.co.jp
zenback

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$152,708,987 USD 4/5
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Domain Valuation Snoop Score
itmedia.ba
0/5
itmedia.biz
0/5
itmedia.co.in
0/5
itmedia.com
0/5
itmedia.nu
0/5

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