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Lighthouse Mobile

· 0 checks — Mobile Lighthouse audit -- Performance, Accessibility, Best Practices, and SEO category breakdown.
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Detailed Report

Audit breakdown by category with detailed findings.

31

Performance

Insights

Remove large, duplicate JavaScript modules from bundles to reduce unnecessary bytes consumed by network activity.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Polyfills and transforms enable older browsers to use new JavaScript features. However, many aren't necessary for modern browsers. Consider modifying your JavaScript build process to not transpile Baseline features, unless you know you must support older browsers. Learn why most sites can deploy ES6+ code without transpiling

Why this matters

Performance issues directly impact user engagement and conversion rates.

3rd party code can significantly impact load performance. Reduce and defer loading of 3rd party code to prioritize your page's content.

Why this matters

Performance issues directly impact user engagement and conversion rates.

A long cache lifetime can speed up repeat visits to your page. Learn more about caching.

Why this matters

Performance issues directly impact user engagement and conversion rates.

RequestCache TTLTransfer Size
s-cdn.rmp.rakuten.co.jp/js/cd.js3600.0 s120.2 KiB
s-cdn.rmp.rakuten.co.jp/js/aa.js3600.0 s102.6 KiB
ads.pubmatic.com/AdServer/js/pwt/135165/1274/pwt.js125085.0 s177.4 KiB
/pagead/managed/js/activeview/current/ufs_web_display.js3600.0 s73.1 KiB
media.image.infoseek.co.jp/shared/push_notification/2406_message.png300.0 s56.7 KiB
cdn.id5-sync.com/api/1.0/id5PrebidModule.js3600.0 s29.5 KiB
www.infoseek.co.jp/sp/img/image_all-1.3.png604800.0 s147.5 KiB
c2.taboola.com/nr/rakuten-infoseek/newsroom.js14400.0 s17.9 KiB
www.infoseek.co.jp/sp/img/mission/image_all-v04.png604800.0 s98.8 KiB
eus.rubiconproject.com/usync.js10464.0 s11.5 KiB
r.r10s.jp/com/rat/js/rat-main.js86400.0 s15.8 KiB
/isnews/photos/iza/iza_E3ZUJPOKZ5EQ3EZXSMX5AVRG3M_0-mobil...600.0 s6.5 KiB
/shared/news/npf/images/sns_app_mail/sp/official_hdg_lv2_...300.0 s5.0 KiB
media.image.infoseek.co.jp/isnews/photos/tbs/tbs_2615548_0-mobile.jpg600.0 s5.2 KiB
r.r10s.jp/com/rat/js/ral-1.10.1.js86400.0 s11.7 KiB
jp.rakuten-static.com/1/grp/banner/js/rc-gp-sp.v3.js0.0 ms4.5 KiB
cdn.jsdelivr.net/npm/swiper@11/swiper-bundle.min.js604800.0 s43.2 KiB
www.infoseek.co.jp/sp/img/hdg_lv2_text-1.4.png604800.0 s39.8 KiB
/isnews/photos/itmedia_nlab/itmedia_nlab_3816299_0-mobile...600.0 s4.3 KiB
/isnews/photos/yomiuri/yomiuri_20260421_gyt1t00343_0-mobi...600.0 s4.2 KiB
r.r10s.jp/com/ap/target/phoenix-2.8.1.min.js86400.0 s9.3 KiB
jp.rakuten-static.com/1/grp/banner/js/cmo_dynamic_scid_webcx.js0.0 ms3.2 KiB
r.r10s.jp/com/rat/plugin/media/main.js86400.0 s8.0 KiB
www.infoseek.co.jp/03/lib/jquery-3.5.1.min.js604800.0 s30.8 KiB
media.image.infoseek.co.jp/isnews/photos/bunshun/bunshun_87718_0-mobile.jpg600.0 s3.3 KiB
intljs.rmtag.com/115557.ct.js86400.0 s6.4 KiB
jp.rakuten-static.com/1/grp/banner/css/rc-gp-sp-blue.v3.css0.0 ms2.3 KiB
www.infoseek.co.jp/03/lib/jquery.royalslider-1.0.min.js604800.0 s17.3 KiB
jp.rakuten-static.com/1/grp/banner/js/create.js0.0 ms1.5 KiB
media.image.infoseek.co.jp/shared/news/js/lazyload.min.js300.0 s1.4 KiB
jp.rakuten-static.com/1/grp/banner/js/rc_gp_sp_banner.js0.0 ms1.2 KiB
pm-widget.taboola.com/rakuten-infoseek/load.js3600.0 s1.5 KiB
media.image.infoseek.co.jp/shared/news/npf/images/sns_app_mail/sp/arrow04.png300.0 s1.1 KiB
www.infoseek.co.jp/03/lib/URI.js-1.19.1.js604800.0 s10.4 KiB
/shared/news/npf/images/sns_app_mail/sp/bg_stripe03.png300.0 s1008 B
/?cpkg_none=%7B%22acc%22%3A461%2C%22aid%22%3A1%2C%22bid%2...0.0 ms877 B
www.infoseek.co.jp/sp/css/common-1.22.css604800.0 s8.4 KiB
pagead2.googlesyndication.com/pagead/js/r20260420/r20110914/abg_lite_fy2021.js1209600.0 s8.4 KiB
www.infoseek.co.jp/sp/img/column-tab_text-1.1.png604800.0 s7.7 KiB
www.rakuten.co.jp/com/advance/ichiba/rc-gp-sp_banner_scv/sp/condition.js0.0 ms700 B
www.infoseek.co.jp/sp/js/common-1.9.js604800.0 s6.3 KiB
jp.rakuten-static.com/1/im/grp/prtl/img/thumb/groupportal01/rc-gp-sprites.png0.0 ms596 B
/?cpkg_none=%7B%22acc%22%3A486%2C%22aid%22%3A1%2C%22bid%2...0.0 ms584 B
cdn.jsdelivr.net/npm/swiper@11/swiper-bundle.min.css604800.0 s5.1 KiB
www.infoseek.co.jp/sp/css/components/information-1.7.css604800.0 s5.0 KiB
www.infoseek.co.jp/sp/img/mission/icon_mission_completed.png604800.0 s4.7 KiB
www.infoseek.co.jp/sp/js/infoseek_upper-1.3.js604800.0 s4.7 KiB
/newsroom/1.0/rakuten-infoseek/get-action?page.url=https%...0.0 ms394 B
www.infoseek.co.jp/sp/css/components/mission/mission_status-1.5.css604800.0 s3.0 KiB
www.infoseek.co.jp/sp/img/site_logo_infoseek-1.0.svg604800.0 s2.7 KiB
www.infoseek.co.jp/sp/img/arrow01-1.0.png604800.0 s2.7 KiB
www.infoseek.co.jp/common/js/interstitial_ads-1.3.js604800.0 s2.6 KiB
www.infoseek.co.jp/sp/img/money/icon_money-point.png604800.0 s2.5 KiB
www.infoseek.co.jp/sp/css/top_topics-1.2.css604800.0 s2.4 KiB
www.infoseek.co.jp/sp/img/mission/icon_mission_checkmark.png604800.0 s2.4 KiB
www.infoseek.co.jp/sp/img/mission/icon_mission_checkmark_gray.png604800.0 s2.3 KiB
www.infoseek.co.jp/sp/js/display_mission_status-1.5.js604800.0 s2.3 KiB
www.infoseek.co.jp/03/lib/jquery.url-1.0.js604800.0 s2.1 KiB
www.infoseek.co.jp/sp/js/mission_status-1.6.js604800.0 s2.1 KiB
/unfilled?datp=sfBd1r-i3Et9GmsYiaKBnbOYO9b-vi5NggpyERzIJY...0.0 ms195 B
www.infoseek.co.jp/sp/js/flash-1.3.js604800.0 s1.8 KiB
www.infoseek.co.jp/03/lib/js.cookie-2.2.0.min.js604800.0 s1.7 KiB
www.infoseek.co.jp/sp/img/topics_line_gray-1.0.png604800.0 s1.6 KiB
www.infoseek.co.jp/sp/img/topics_line_white-1.0.png604800.0 s1.6 KiB
www.infoseek.co.jp/sp/img/hdg_lv2_line-1.0.png604800.0 s1.6 KiB
www.infoseek.co.jp/sp/css/components/earthquake-1.2.css604800.0 s1.6 KiB
www.infoseek.co.jp/common/js/indexed_database-1.0.js604800.0 s1.4 KiB
www.infoseek.co.jp/sp/css/components/interstitial_ads-1.2.css604800.0 s1.3 KiB
www.infoseek.co.jp/sp/css/reset-1.0.css604800.0 s1.3 KiB
www.infoseek.co.jp/sp/js/trend_words-1.0.js604800.0 s1.3 KiB
www.infoseek.co.jp/sp/css/components/trend_words-1.0.css604800.0 s1.3 KiB
/pagead/js/r20260420/r20110914/client/window_focus_fy2021.js1209600.0 s1.2 KiB
www.infoseek.co.jp/sp/js/logout-1.0.js604800.0 s1.2 KiB
www.infoseek.co.jp/sp/css/components/top_topics_column-1.2.css604800.0 s1.2 KiB
www.infoseek.co.jp/sp/css/components/top_ranking-1.1.css604800.0 s1.2 KiB
/unfilled?datp=6oLL4r2mOHZMhoYgb5Ls_mJQJqCecb23x98p4B9dzB...0.0 ms119 B
www.infoseek.co.jp/sp/img/mission/icon_luckey_kuji.svg604800.0 s1.1 KiB
www.infoseek.co.jp/sp/js/login_check-1.3.js604800.0 s1.0 KiB
www.infoseek.co.jp/sp/css/components/typhoon-1.3.css604800.0 s1015 B
cdn.indexww.com/ht/htw-pixel.gif?086400.0 s251 B
www.infoseek.co.jp/common/js/top_rat-1.1.js604800.0 s975 B
www.infoseek.co.jp/sp/img/icon_login.svg604800.0 s955 B
www.infoseek.co.jp/sp/img/icon_logout.svg604800.0 s951 B
media.image.infoseek.co.jp/isnews/pc/img/icon_error-1.0.png604800.0 s904 B
www.infoseek.co.jp/common/js/referrer_check-1.0.js604800.0 s889 B
www.infoseek.co.jp/sp/img/icon_notification-1.0.svg604800.0 s882 B
www.infoseek.co.jp/sp/img/mission/information_menu_arrow01.svg604800.0 s868 B
www.infoseek.co.jp/sp/css/components/teamsite/notice_middle-1.0.css604800.0 s832 B
www.infoseek.co.jp/sp/css/components/teamsite/notice-1.0.css604800.0 s828 B
/st?cijs=convusmp&ttype=45&cisd=convusmp&cipid=66361655&c...0.0 ms43 B
/st?cijs=convusmp&ttype=16&cisd=convusmp&cipid=66361655&c...0.0 ms43 B
/pagead/managed/js/activeview/current/ufs_web_display.js3600.0 s0 B
s-cdn.rmp.rakuten.co.jp/js/cd.js3600.0 s0 B

Your first network request is the most important. Reduce its latency by avoiding redirects, ensuring a fast server response, and enabling text compression.

Why this matters

Performance issues directly impact user engagement and conversion rates.

A forced reflow occurs when JavaScript queries geometric properties (such as offsetWidth) after styles have been invalidated by a change to the DOM state. This can result in poor performance. Learn more about forced reflows and possible mitigations.

Why this matters

Performance issues directly impact user engagement and conversion rates.

headings: [map[key:source label:Top function call valueType:source-location] map[granularity:1 key:reflowTime label:Total reflow time valueType:ms]]
items: [map[reflowTime:20.439 source:map[column:265327 line:1 type:source-location url:https://cdn.taboola.com/libtrc/rakuten-infoseek/loader.js urlProvider:network]]]
headings: [map[key:source label:Source valueType:source-location] map[granularity:1 key:reflowTime label:Total reflow time valueType:ms]]
items: [map[reflowTime:49.845 source:map[column:463327 line:0 type:source-location url:https://cdn.taboola.com/libtrc/rakuten-infoseek/loader.js urlProvider:network]] map[reflowTime:22.173 source:map[column:466484 line:0 type:source-location url:https://cdn.taboola.com/libtrc/rakuten-infoseek/loader.js urlProvider:network]] map[reflowTime:19.904 source:map[column:468349 line:0 type:source-location url:https://cdn.taboola.com/libtrc/rakuten-infoseek/loader.js urlProvider:network]]]

Each subpart has specific improvement strategies. Ideally, most of the LCP time should be spent on loading the resources, not within delays.

Why this matters

Performance issues directly impact user engagement and conversion rates.

headings: [map[key:label label:Subpart valueType:text] map[key:duration label:Duration valueType:ms]]
items: [map[duration:1045.2330009765626 label:Time to first byte subpart:timeToFirstByte] map[duration:2000.8109990234375 label:Resource load delay subpart:resourceLoadDelay] map[duration:304.512 label:Resource load duration subpart:resourceLoadDuration] map[duration:11.764 label:Element render delay subpart:elementRenderDelay]]
lhId: page-0-IMG
nodeLabel: Rakuten Mobile
path: 1,HTML,1,BODY,7,HEADER,0,DIV,0,DIV,0,DIV,5,DIV,1,A,0,IMG
selector: div > div#mkdiv_header_pitari > a#cmo_pitari_banner > img
snippet: <img alt="Rakuten Mobile" src="https://cdn.rmc.contents.rakuten.co.jp/block/d40535ac09aac0ef32f8a23b8bb8e…" width="750" height="80" style="width: 100%; height: auto;">

Optimize LCP by making the LCP image discoverable from the HTML immediately, and avoiding lazy-loading

Why this matters

Performance issues directly impact user engagement and conversion rates.

lhId: page-0-IMG
nodeLabel: Rakuten Mobile
path: 1,HTML,1,BODY,7,HEADER,0,DIV,0,DIV,0,DIV,5,DIV,1,A,0,IMG
selector: div > div#mkdiv_header_pitari > a#cmo_pitari_banner > img
snippet: <img alt="Rakuten Mobile" src="https://cdn.rmc.contents.rakuten.co.jp/block/d40535ac09aac0ef32f8a23b8bb8e…" width="750" height="80" style="width: 100%; height: auto;">

HTTP/2 and HTTP/3 offer many benefits over HTTP/1.1, such as multiplexing. Learn more about using modern HTTP.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLProtocol
jp.rakuten-static.com/1/grp/banner/js/create.jshttp/1.1
jp.rakuten-static.com/1/grp/banner/css/rc-gp-sp-blue.v3.csshttp/1.1
jp.rakuten-static.com/1/grp/banner/js/rc_gp_sp_banner.jshttp/1.1
jp.rakuten-static.com/1/grp/banner/js/rc-gp-sp.v3.jshttp/1.1
jp.rakuten-static.com/1/im/grp/prtl/img/thumb/groupportal01/rc-gp-sprites.pnghttp/1.1
jp.rakuten-static.com/1/grp/banner/js/cmo_dynamic_scid_webcx.jshttp/1.1

Avoid chaining critical requests by reducing the length of chains, reducing the download size of resources, or deferring the download of unnecessary resources to improve page load.

Why this matters

Performance issues directly impact user engagement and conversion rates.

description: [preconnect](https://developer.chrome.com/docs/lighthouse/performance/uses-rel-preconnect/) hints help the browser establish a connection earlier in the page load, saving time when the first request for that origin is made. The following are the origins that the page preconnected to.
title: Preconnected origins
value: no origins were preconnected
description: Add [preconnect](https://developer.chrome.com/docs/lighthouse/performance/uses-rel-preconnect/) hints to your most important origins, but try to use no more than 4.
title: Preconnect candidates

Requests are blocking the page's initial render, which may delay LCP. Deferring or inlining can move these network requests out of the critical path.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLTransfer SizeDuration
www.infoseek.co.jp/sp/css/components/information-1.7.css5.0 KiB
www.infoseek.co.jp/sp/css/reset-1.0.css1.3 KiB
www.infoseek.co.jp/sp/css/components/earthquake-1.2.css1.6 KiB151 ms
www.infoseek.co.jp/sp/css/common-1.22.css8.4 KiB
www.infoseek.co.jp/sp/js/common-1.9.js6.3 KiB151 ms
www.infoseek.co.jp/03/lib/jquery-3.5.1.min.js30.8 KiB452 ms
www.infoseek.co.jp/sp/css/components/typhoon-1.3.css1015 B
r.r10s.jp/com/rex/css-framework/0.1.4-beta/css/rex-icons.css75.0 KiB1.4 s

Reducing the download time of images can improve the perceived load time of the page and LCP. Learn more about optimizing image size

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLResource SizeEst Savings
body.jar > div#google_image_div > a#aw0 > img.img_ad body.jar > div#google_image_div > a#aw0 > img.img_ad
tpc.googlesyndication.com/simgad/47416141309172760325.8 KiB13.6 KiB
Image for Taboola Advertising Unit div.videoCube > a.item-thumbnail-href > div.thumbBlock_holder > span.thumbBlock
/taboola/image/fetch/f_jpg,q_auto,h_240,w_240,c_fill,g_fa...19.9 KiB10.6 KiB
Image for Taboola Advertising Unit div.videoCube > a.item-thumbnail-href > div.thumbBlock_holder > span.thumbBlock
/taboola/image/fetch/f_jpg,q_auto,h_240,w_240,c_fill,g_fa...19.0 KiB9.7 KiB
Rakuten Mobile div > div#mkdiv_header_pitari > a#cmo_pitari_banner > img
/block/d40535ac09aac0ef32f8a23b8bb8e04bc2e8f9d6b0981fa98a...15.3 KiB6.3 KiB
ニュースランキング section#content > section#anchor_ranking > div.hdg_lv2 > h2.image_text
www.infoseek.co.jp/sp/img/hdg_lv2_text-1.4.png39.2 KiB6.3 KiB
Image for Taboola Advertising Unit div.videoCube > a.item-thumbnail-href > div.thumbBlock_holder > span.thumbBlock
/taboola/image/fetch/h_240,w_240,c_pad,b_white/https://cd...13.8 KiB4.4 KiB

These insights are also available in the Chrome DevTools Performance Panel - record a trace to view more detailed information.

Time to Interactive is the amount of time it takes for the page to become fully interactive. Learn more about the Time to Interactive metric.

Why this matters

Performance issues directly impact user engagement and conversion rates.

TTI

Redirects introduce additional delays before the page can be loaded. Learn how to avoid page redirects.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 1.5 s
URLTime Spent
infoseek.co.jp/1.5 s
www.infoseek.co.jp/0.0 ms

The maximum potential First Input Delay that your users could experience is the duration of the longest task. Learn more about the Maximum Potential First Input Delay metric.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Diagnostics

Minifying JavaScript files can reduce payload sizes and script parse time. Learn how to minify JavaScript.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 150 ms 13.7 KiB
URLTransfer SizeEst Savings
jp-tags.mediaforge.com/js/2936/16.0 KiB5.0 KiB
r.r10s.jp/com/rat/js/rat-main.js15.5 KiB3.2 KiB
www.infoseek.co.jp/sp/js/common-1.9.js5.7 KiB3.1 KiB
www.infoseek.co.jp/sp/js/infoseek_upper-1.3.js4.1 KiB2.4 KiB

Reduce unused rules from stylesheets and defer CSS not used for above-the-fold content to decrease bytes consumed by network activity. Learn how to reduce unused CSS.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 490 ms 90.1 KiB
URLTransfer SizeEst Savings
r.r10s.jp/com/rex/css-framework/0.1.4-beta/css/rex-icons.css74.7 KiB74.6 KiB
:root { --cm-video-brand-primary: var(--yb-grape-jelly, #7e1fff); --cm-video-brand-secondary: v…16.0 KiB15.5 KiB

Reduce unused JavaScript and defer loading scripts until they are required to decrease bytes consumed by network activity. Learn how to reduce unused JavaScript.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 4.3 s 1.4 MiB
URLTransfer SizeEst Savings
cdn.taboola.com/libtrc/rakuten-infoseek/loader.js324.4 KiB160.4 KiB
ads.pubmatic.com/AdServer/js/pwt/135165/1274/pwt.js177.1 KiB118.5 KiB
cpt.geniee.jp/hb/v1/lib/prebid-v9.50.0-0eb62f07.js210.2 KiB101.3 KiB
/pagead/managed/js/gpt/m202604170101/pubads_impl.js?cb=31...187.4 KiB97.7 KiB
s-cdn.rmp.rakuten.co.jp/js/cd.js120.0 KiB87.1 KiB
s-cdn.rmp.rakuten.co.jp/js/cd.js120.0 KiB87.1 KiB
s-cdn.rmp.rakuten.co.jp/js/aa.js102.3 KiB71.3 KiB
s-cdn.rmp.rakuten.co.jp/js/aa.js102.3 KiB71.3 KiB
s-cdn.rmp.rakuten.co.jp/js/aa.js102.3 KiB71.3 KiB
s-cdn.rmp.rakuten.co.jp/js/aa.js102.3 KiB71.3 KiB
vidstat.taboola.com/vpaid/units/36_0_9/infra/cmTagFEED_MANAGER.js113.6 KiB69.5 KiB
vidstat.taboola.com/vpaid/vPlayer/player/v18.0.4/OvaMediaPlayer.js87.1 KiB54.3 KiB
s-cdn.rmp.rakuten.co.jp/js/aa.js102.3 KiB54.1 KiB
cpt.geniee.jp/hb/v1/lib/gnshbrequest-v5.11.6.js78.8 KiB42.0 KiB
fundingchoicesmessages.google.com/i/7727?ers=368.8 KiB37.7 KiB
/sdk/webcx-web-blocks/2.73.0/webcx-web-blocks.production....99.2 KiB36.3 KiB
/pagead/managed/js/activeview/current/ufs_web_display.js73.1 KiB31.1 KiB
/pagead/managed/js/activeview/current/ufs_web_display.js73.1 KiB31.1 KiB
cdn.jsdelivr.net/npm/swiper@11/swiper-bundle.min.js43.0 KiB29.1 KiB
securepubads.g.doubleclick.net/tag/js/gpt.js34.4 KiB24.0 KiB
securepubads.g.doubleclick.net/tag/js/gpt.js34.4 KiB24.0 KiB
securepubads.g.doubleclick.net/tag/js/gpt.js34.4 KiB24.0 KiB

Consider reducing the time spent parsing, compiling, and executing JS. You may find delivering smaller JS payloads helps with this. Learn how to reduce Javascript execution time.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLTotal CPU TimeScript EvaluationScript Parse
www.infoseek.co.jp/3.1 s137 ms14 ms
Unattributable2.0 s572 ms0.0 ms
cpt.geniee.jp/hb/v1/lib/gnshbrequest-v5.11.6.js1.1 s1.0 s18 ms
cdn.taboola.com/libtrc/rakuten-infoseek/loader.js1.1 s505 ms115 ms
/pagead/managed/js/gpt/m202604170101/pubads_impl.js?cb=31...533 ms417 ms65 ms
/pagead/managed/js/activeview/current/ufs_web_display.js501 ms417 ms68 ms
/sdk/webcx-web-blocks/2.73.0/webcx-web-blocks.production....378 ms319 ms25 ms
vidstat.taboola.com/lite-unit/5.7.0/UnitFeedManagerMobile.min.js344 ms290 ms10 ms
s-cdn.rmp.rakuten.co.jp/js/aa.js339 ms203 ms45 ms
vidstat.taboola.com/vpaid/units/36_0_9/infra/cmTagFEED_MANAGER.js313 ms251 ms42 ms
cpt.geniee.jp/hb/v1/lib/prebid-v9.50.0-0eb62f07.js295 ms236 ms42 ms
fundingchoicesmessages.google.com/i/7727?ers=3270 ms242 ms20 ms
ads.pubmatic.com/AdServer/js/pwt/135165/1274/pwt.js257 ms214 ms39 ms
cdnjs.cloudflare.com/ajax/libs/lazysizes/5.2.2/lazysizes.min.js236 ms63 ms0.9 ms
www.infoseek.co.jp/03/lib/jquery-3.5.1.min.js218 ms178 ms6.8 ms
pm-widget.taboola.com/rakuten-infoseek/pmk-20220605.4.js158 ms148 ms5.6 ms
securepubads.g.doubleclick.net/tag/js/gpt.js112 ms68 ms43 ms
intljs.rmtag.com/115557.ct.js99 ms86 ms2.1 ms
vidstat.taboola.com/vpaid/vPlayer/player/v18.0.4/OvaMediaPlayer.js89 ms53 ms32 ms
cdn.id5-sync.com/api/1.0/id5PrebidModule.js81 ms67 ms8.0 ms
r.r10s.jp/com/rat/js/ral-1.10.1.js68 ms57 ms2.5 ms
c2.taboola.com/nr/rakuten-infoseek/newsroom.js59 ms52 ms6.1 ms
cpt.geniee.jp/hb/v1/150154/813/wrapper.min.js55 ms39 ms13 ms

Consider reducing the time spent parsing, compiling and executing JS. You may find delivering smaller JS payloads helps with this. Learn how to minimize main-thread work

Why this matters

Performance issues directly impact user engagement and conversion rates.

CategoryTime Spent
Script Evaluation5.9 s
Other3.4 s
Style & Layout1.5 s
Script Parsing & Compilation703 ms
Rendering313 ms
Parse HTML & CSS149 ms
Garbage Collection132 ms

Large network payloads cost users real money and are highly correlated with long load times. Learn how to reduce payload sizes.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLTransfer Size
cdn.taboola.com/libtrc/rakuten-infoseek/loader.js325.0 KiB
cpt.geniee.jp/hb/v1/lib/prebid-v9.50.0-0eb62f07.js210.4 KiB
/pagead/managed/js/gpt/m202604170101/pubads_impl.js?cb=31...187.4 KiB
ads.pubmatic.com/AdServer/js/pwt/135165/1274/pwt.js177.4 KiB
www.infoseek.co.jp/sp/img/image_all-1.3.png147.5 KiB
s-cdn.rmp.rakuten.co.jp/js/cd.js120.2 KiB
vidstat.taboola.com/vpaid/units/36_0_9/infra/cmTagFEED_MANAGER.js113.9 KiB
s-cdn.rmp.rakuten.co.jp/js/aa.js102.6 KiB
/sdk/webcx-web-blocks/2.73.0/webcx-web-blocks.production....99.3 KiB
www.infoseek.co.jp/sp/img/mission/image_all-v04.png98.8 KiB

Set an explicit width and height on image elements to reduce layout shifts and improve CLS. Learn how to set image dimensions

Why this matters

Performance issues directly impact user engagement and conversion rates.

URL
ウェブPush通知を受け取ろう！ div.interstitial-modal-container > div > a > img
media.image.infoseek.co.jp/shared/push_notification/2406_message.png
div.co-Widget > div.header_inner > a#loginBtn > img div.co-Widget > div.header_inner > a#loginBtn > img
www.infoseek.co.jp/sp/img/icon_login.svg
tr > td > span > img tr > td > span > img
media.image.infoseek.co.jp/isnews/pc/img/icon_error-1.0.png

More information about the performance of your application. These numbers don't directly affect the Performance score.

●Layout shift culprits
●Optimize DOM size
●Font display
●Optimize viewport for mobile
●Minify CSS
●User Timing marks and measures 41 user timings
●Avoid long main-thread tasks 20 long tasks found
●Page didn't prevent back/forward cache restoration
●Network Requests
●Network Round Trip Times 260 ms
●Server Backend Latencies 2,780 ms
●Tasks
●Diagnostics
●Metrics
●Screenshot Thumbnails
●Final Screenshot
●Script Treemap Data
●Resources Summary
●Initial server response time was short Root document took 260 ms
●Avoid large layout shifts 3 layout shifts found
○INP breakdown
○Avoid non-composited animations
80

Accessibility

These checks highlight opportunities to improve the accessibility of your web app. Automatic detection can only detect a subset of issues and does not guarantee the accessibility of your web app, so manual testing is also encouraged.

ARIA

When an element doesn't have an accessible name, screen readers announce it with a generic name, making it unusable for users who rely on screen readers. Learn how to make command elements more accessible.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
body > ins#geniee_overlay_outer > ins#geniee_overlay_inner > span#geniee_overlay_close body > ins#geniee_overlay_outer > ins#geniee_overlay_inner > span#geniee_overlay_close

These are opportunities to improve the usage of ARIA in your application which may enhance the experience for users of assistive technology, like a screen reader.

Contrast

Low-contrast text is difficult or impossible for many users to read. Learn how to provide sufficient color contrast.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
未設定 div.information_menu > div.infomenu_list > a.btn_weather > p.lead
THE ANSWER a.item-label-href > span.video-label-box > span.video-label > span.tbl-data-field
2026年04月21日 div.videoCube > a.item-label-href > span.video-label-box > span.video-label
集英社オンライン a.item-label-href > span.video-label-box > span.video-label > span.tbl-data-field
2026年04月21日 div.videoCube > a.item-label-href > span.video-label-box > span.video-label
Record China a.item-label-href > span.video-label-box > span.video-label > span.tbl-data-field
2026年04月21日 div.videoCube > a.item-label-href > span.video-label-box > span.video-label
日刊ゲンダイDIGITAL a.item-label-href > span.video-label-box > span.video-label > span.tbl-data-field
2026年04月21日 div.videoCube > a.item-label-href > span.video-label-box > span.video-label
読売新聞 a.item-label-href > span.video-label-box > span.video-label > span.tbl-data-field
2026年04月21日 div.videoCube > a.item-label-href > span.video-label-box > span.video-label
日刊ゲンダイDIGITAL a.item-label-href > span.video-label-box > span.video-label > span.tbl-data-field
2026年04月21日 div.videoCube > a.item-label-href > span.video-label-box > span.video-label
スポニチアネックス a.item-label-href > span.video-label-box > span.video-label > span.tbl-data-field
2026年04月19日 div.videoCube > a.item-label-href > span.video-label-box > span.video-label
プレジデントオンライン a.item-label-href > span.video-label-box > span.video-label > span.tbl-data-field
2026年04月21日 div.videoCube > a.item-label-href > span.video-label-box > span.video-label
スポニチアネックス a.item-label-href > span.video-label-box > span.video-label > span.tbl-data-field
2026年04月19日 div.videoCube > a.item-label-href > span.video-label-box > span.video-label
Verisure a.item-label-href > span.video-label-box > span.branding > span.branding-inner
(PR) span.branding > div.logoDiv > a.trc_mobile_disclosure_link > span
© Rakuten Group, Inc. footer#footer > div.rex-footer > div.rex-footer--inner > p.rex-footer-copyright

Low-contrast text is difficult or impossible for many users to read. Link text that is discernible improves the experience for users with low vision. Learn how to make links distinguishable.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
提供元企業 footer#footer > div.copyrights-text > p > a

These are opportunities to improve the legibility of your content.

Tables and lists

Screen readers require list items (`<li>`) to be contained within a parent `<ul>`, `<ol>` or `<menu>` to be announced properly. Learn more about proper list structure.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
大谷翔平 div.swiper > div#swiper-wrapper-86afbc1092c89718f > ul.swiper-slide > li.trend-words__item
4月 変わる制度 div.swiper > div#swiper-wrapper-86afbc1092c89718f > ul.swiper-slide > li.trend-words__item
GW特集 div.swiper > div#swiper-wrapper-86afbc1092c89718f > ul.swiper-slide > li.trend-words__item
マスターズゴルフ div.swiper > div#swiper-wrapper-86afbc1092c89718f > ul.swiper-slide > li.trend-words__item
イラン情勢 div.swiper > div#swiper-wrapper-86afbc1092c89718f > ul.swiper-slide > li.trend-words__item
春ドラマ div.swiper > div#swiper-wrapper-86afbc1092c89718f > ul.swiper-slide > li.trend-words__item
プロ野球 div.swiper > div#swiper-wrapper-86afbc1092c89718f > ul.swiper-slide > li.trend-words__item
高市政権 div.swiper > div#swiper-wrapper-86afbc1092c89718f > ul.swiper-slide > li.trend-words__item
京都 男児 div.swiper > div#swiper-wrapper-86afbc1092c89718f > ul.swiper-slide > li.trend-words__item
皇室典範 div.swiper > div#swiper-wrapper-86afbc1092c89718f > ul.swiper-slide > li.trend-words__item
ローマ教皇 div.swiper > div#swiper-wrapper-86afbc1092c89718f > ul.swiper-slide > li.trend-words__item
りくりゅう div.swiper > div#swiper-wrapper-86afbc1092c89718f > ul.swiper-slide > li.trend-words__item

These are opportunities to improve the experience of reading tabular or list data using assistive technology, like a screen reader.

Best practices

Disabling zooming is problematic for users with low vision who rely on screen magnification to properly see the contents of a web page. Learn more about the viewport meta tag.

Why this matters

Informational: a Permissions-Policy directive showing feature -> allowed origins.

Source: MDN Permissions-Policy

Failing Elements
head > meta head > meta

These items highlight common accessibility best practices.

Visible text labels that do not match the accessible name can result in a confusing experience for screen reader users. Learn more about accessible names.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
(PR) span.video-label-box > span.branding > div.logoDiv > a.trc_mobile_disclosure_link
○Interactive controls are keyboard focusable
○Interactive elements indicate their purpose and state
○The page has a logical tab order
○Visual order on the page follows DOM order
○User focus is not accidentally trapped in a region
○The user's focus is directed to new content added to the page
○HTML5 landmark elements are used to improve navigation
○Offscreen content is hidden from assistive technology
○Custom controls have associated labels
○Custom controls have ARIA roles
●`[aria-*]` attributes match their roles
●`[aria-hidden="true"]` is not present on the document `<body>`
●`[role]`s have all required `[aria-*]` attributes
●`[role]` values are valid
●`[aria-*]` attributes have valid values
●`[aria-*]` attributes are valid and not misspelled
●Image elements have `[alt]` attributes
●ARIA attributes are used as specified for the element's role
●Elements use only permitted ARIA attributes
●Document has a `<title>` element
●`<frame>` or `<iframe>` elements have a title
●`<html>` element has a `[lang]` attribute
●`<html>` element has a valid value for its `[lang]` attribute
●Links have a discernible name
●Lists contain only `<li>` elements and script supporting elements (`<script>` and `<template>`).
●No element has a `[tabindex]` value greater than 0
●Touch targets have sufficient size and spacing.
●Cells in a `<table>` element that use the `[headers]` attribute refer to table cells within the same table.
●Heading elements appear in a sequentially-descending order
●Document has a main landmark.
●Deprecated ARIA roles were not used
●Identical links have the same purpose.
○`[accesskey]` values are unique
○Elements with `role="dialog"` or `role="alertdialog"` have accessible names.
○`[aria-hidden="true"]` elements do not contain focusable descendents
○ARIA input fields have accessible names
○ARIA `meter` elements have accessible names
○ARIA `progressbar` elements have accessible names
○Elements with an ARIA `[role]` that require children to contain a specific `[role]` have all required children.
○`[role]`s are contained by their required parent element
○Elements with the `role=text` attribute do not have focusable descendents.
○ARIA toggle fields have accessible names
○ARIA `tooltip` elements have accessible names
○ARIA `treeitem` elements have accessible names
○Buttons have an accessible name
○The page contains a heading, skip link, or landmark region
○`<dl>`'s contain only properly-ordered `<dt>` and `<dd>` groups, `<script>`, `<template>` or `<div>` elements.
○Definition list items are wrapped in `<dl>` elements
○ARIA IDs are unique
○No form fields have multiple labels
○`<html>` element has an `[xml:lang]` attribute with the same base language as the `[lang]` attribute.
○Input buttons have discernible text.
○`<input type="image">` elements have `[alt]` text
○Form elements have associated labels
○The document does not use `<meta http-equiv="refresh">`
○`<object>` elements have alternate text
○Select elements have associated label elements.
○Skip links are focusable.
○`<th>` elements and elements with `[role="columnheader"/"rowheader"]` have data cells they describe.
○`[lang]` attributes have a valid value
○`<video>` elements contain a `<track>` element with `[kind="captions"]`
○Tables have different content in the summary attribute and `<caption>`.
○All heading elements contain content.
○Uses ARIA roles only on compatible elements
○Image elements do not have `[alt]` attributes that are redundant text.
○Tables use `<caption>` instead of cells with the `[colspan]` attribute to indicate a caption.
○`<td>` elements in a large `<table>` have one or more table headers.
77

Best Practices

General

Deprecated APIs will eventually be removed from the browser. Learn more about deprecated APIs.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Deprecation / WarningSource
Topics
cpt.geniee.jp/hb/v1/lib/prebid-v9.50.0-0eb62f07.js line 106, col 1159

Errors logged to the console indicate unresolved problems. They can come from network request failures and other browser concerns. Learn more about this errors in console diagnostic audit

Why this matters

Performance issues directly impact user engagement and conversion rates.

SourceDescription
www.infoseek.co.jp/
Access to fetch at 'https://aladdin.genieesspv.jp/yie/ld/api/ad_call/v2?zoneid=1594872&cb=73358160041&charset=UTF-8&loc=https%3A%2F%2Fwww.infoseek.co.jp%2F&ct0=undefined&referer=undefined&topframe=1&cur=JPY&requestid=78954c29b115f428&ua=Mozilla%2F5.0%20(Linux%3B%20Android%2011%3B%20moto%20g%20power%20(2022))%20AppleWebKit%2F537.36%20(KHTML%2C%20like%20Gecko)%20Chrome%2F147.0.0.0%20Mobile%20Safari%2F537.36&tpaf=1&cks=1&ib=1&tmpval=%7B%22loctype%22%3A%22type1%22%2C%22pvId%22%3A%2288ad3350-02d5-4e86-9a62-10cc7ac45024%22%7D&gpid=%2F150154%2F1575786&rl_pid=9604&fl_pr=9.1&title=Infoseek%255B%25E3%2582%25A4%25E3%2583%25B3%25E3%2583%2595%25E3%2582%25A9%25E3%2582%25B7%25E3%2583%25BC%25E3%2582%25AF%255D%2520-%2520%25E6%25A5%25BD%25E5%25A4%25A9%25E3%2581%258C%25E9%2581%258B%25E5%2596%25B6%25E3%2581%2599%25E3%2582%258B%25E3%2583%258B%25E3%2583%25A5%25E3%2583%25BC%25E3%2582%25B9%25E3%2582%25B5%25E3%2582%25A4%25E3%2583%2588&sw=412&sh=823&ucmbl=%3F0' from origin 'https://www.infoseek.co.jp' has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present on the requested resource.
www.infoseek.co.jp/
Access to fetch at 'https://aladdin.genieesspv.jp/yie/ld/api/ad_call/v2?zoneid=1594902&cb=10170496121&charset=UTF-8&loc=https%3A%2F%2Fwww.infoseek.co.jp%2F&ct0=undefined&referer=undefined&topframe=1&cur=JPY&requestid=79e106853dd392e8&ua=Mozilla%2F5.0%20(Linux%3B%20Android%2011%3B%20moto%20g%20power%20(2022))%20AppleWebKit%2F537.36%20(KHTML%2C%20like%20Gecko)%20Chrome%2F147.0.0.0%20Mobile%20Safari%2F537.36&tpaf=1&cks=1&ib=1&tmpval=%7B%22loctype%22%3A%22type1%22%2C%22pvId%22%3A%2288ad3350-02d5-4e86-9a62-10cc7ac45024%22%7D&gpid=%2F150154%2F1575787&rl_pid=9604&fl_pr=11.9&title=Infoseek%255B%25E3%2582%25A4%25E3%2583%25B3%25E3%2583%2595%25E3%2582%25A9%25E3%2582%25B7%25E3%2583%25BC%25E3%2582%25AF%255D%2520-%2520%25E6%25A5%25BD%25E5%25A4%25A9%25E3%2581%258C%25E9%2581%258B%25E5%2596%25B6%25E3%2581%2599%25E3%2582%258B%25E3%2583%258B%25E3%2583%25A5%25E3%2583%25BC%25E3%2582%25B9%25E3%2582%25B5%25E3%2582%25A4%25E3%2583%2588&sw=412&sh=823&ucmbl=%3F0' from origin 'https://www.infoseek.co.jp' has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present on the requested resource.
/yie/ld/api/ad_call/v2?zoneid=1594872&cb=73358160041&char...
Failed to load resource: net::ERR_FAILED
/yie/ld/api/ad_call/v2?zoneid=1594902&cb=10170496121&char...
Failed to load resource: net::ERR_FAILED
d.socdm.com/adgen/prebid?id=204374&posall=SSPLOC&sdktype=0
Failed to load resource: the server responded with a status of 400 (Bad Request)
js.gsspcln.jp/t/556/287/a1556287.js
Failed to load resource: the server responded with a status of 403 ()
●Uses HTTPS
●Avoids third-party cookies
●Allows users to paste into input fields
●Avoids requesting the geolocation permission on page load
●Avoids requesting the notification permission on page load
●Displays images with correct aspect ratio
●Serves images with appropriate resolution
●Page has the HTML doctype
●Properly defines charset
●No issues in the `Issues` panel in Chrome Devtools
●Ensure CSP is effective against XSS attacks
●Use a strong HSTS policy
●Ensure proper origin isolation with COOP
●Mitigate DOM-based XSS with Trusted Types
●Detected JavaScript libraries
●Page has valid source maps
○Redirects HTTP traffic to HTTPS
○Mitigate clickjacking with XFO or CSP
100

SEO

These checks ensure that your page is following basic search engine optimization advice. There are many additional factors Lighthouse does not score here that may affect your search ranking, including performance on Core Web Vitals. Learn more about Google Search Essentials.

○Structured data is valid
●Page isn’t blocked from indexing
●Document has a `<title>` element
●Document has a meta description
●Page has successful HTTP status code
●Links have descriptive text
●Links are crawlable
●robots.txt is valid
●Image elements have `[alt]` attributes
●Document has a valid `hreflang`
●Document has a valid `rel=canonical`

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