Lighthouse Mobile

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

SCORE

GRADE

FIX

REVIEW

PASS

INFO

Detailed Report

Audit breakdown by category with detailed findings.

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.

Request	Cache TTL	Transfer Size
partsa.nikkei.com/parts/ds/images/topic/banner_us_iran_tension_202602_sp.jpg	0.0 ms	369.4 KiB
connect.facebook.net/en_US/fbevents.js	1200.0 s	96.4 KiB
/signals/config/517132292271830?v=2.9.298&r=stable&domain...	1200.0 s	44.1 KiB
cdn.speedcurve.com/js/lux.js?id=18491751	3600.0 s	11.3 KiB
nkispa.nikkei.com/fh/showad_d094700e.js	0.0 ms	8.5 KiB
partsa.nikkei.com/static/nkis/js/foneH.js	60.0 s	2.7 KiB
nkispa.nikkei.com/fh/showad_d094700e_d.js	0.0 ms	2.1 KiB
js.rtoaster.jp/Rtoaster.js	604800.0 s	4.5 KiB
/tr/?id=517132292271830&ev=PageView&dl=https%3A%2F%2Fwww....	0.0 ms	19 B
js.rtoaster.jp/Rtoaster.js	604800.0 s	0 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.

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.

	URL	Resource Size	Est Savings
イラン軍事衝突　ニュース・解説はこちら `div.container_c199s2h > a.link_lp4r7xz > picture.picture_p1geunww > img`	partsa.nikkei.com/parts/ds/images/topic/banner_us_iran_tension_202602_sp.jpg	368.5 KiB	356.5 KiB
div.image_iq1cuxq > div.picture_p1h9z2jq > picture.content_c19bavgi > img.image_i1yka2fr `div.image_iq1cuxq > div.picture_p1h9z2jq > picture.content_c19bavgi > img.image_i1yka2fr`	/https://imgix-proxy.n8s.jp/DSXZQO2898455015042026000000-...	45.8 KiB	40.9 KiB
死亡した男児の自宅周辺の警戒にあたる警察官と集まった報道陣（15日、京都府南丹市） `div.image_irszz0x > div.picture_p1h9z2jq > picture.content_c19bavgi > img.image_i1yka2fr`	/https://imgix-proxy.n8s.jp/DSXZQO2899595015042026000000-...	40.8 KiB	35.9 KiB
熊本地震では少なくとも10病院が全入院患者の避難を余儀なくされた（2016年4月、熊本市） `div.image_irszz0x > div.picture_p1h9z2jq > picture.content_c19bavgi > img.image_i1yka2fr`	/https://imgix-proxy.n8s.jp/DSXZQO2874388010042026000000-...	35.1 KiB	30.4 KiB
3週間かけ欧州の5カ国を回った `div.image_irszz0x > div.picture_p1h9z2jq > picture.content_c19bavgi > img.image_i1yka2fr`	/https://imgix-proxy.n8s.jp/DSXZQO2814767027032026000000-...	32.1 KiB	27.8 KiB
トランプ米大統領㊧と話すバンス副大統領（3月、米ワシントン）=ロイター `div.image_iq1cuxq > div.picture_p1h9z2jq > picture.content_c19bavgi > img.image_i1yka2fr`	/https://imgix-proxy.n8s.jp/DSXZQO2899995016042026000000-...	30.3 KiB	26.3 KiB
div.image_irszz0x > div.picture_p1h9z2jq > picture.content_c19bavgi > img.image_i1yka2fr `div.image_irszz0x > div.picture_p1h9z2jq > picture.content_c19bavgi > img.image_i1yka2fr`	/https://imgix-proxy.n8s.jp/DSXZQO2866001008042026000000-...	27.8 KiB	24.1 KiB
div.image_irszz0x > div.picture_p1h9z2jq > picture.content_c19bavgi > img.image_i1yka2fr `div.image_irszz0x > div.picture_p1h9z2jq > picture.content_c19bavgi > img.image_i1yka2fr`	/https://imgix-proxy.n8s.jp/DSXZQO2899416015042026000000-...	27.0 KiB	23.4 KiB
div.image_irszz0x > div.picture_p1h9z2jq > picture.content_c19bavgi > img.image_i1yka2fr `div.image_irszz0x > div.picture_p1h9z2jq > picture.content_c19bavgi > img.image_i1yka2fr`	/https://imgix-proxy.n8s.jp/DSXZQO2897560015042026000000-...	26.0 KiB	22.5 KiB
div.image_irszz0x > div.picture_p1h9z2jq > picture.content_c19bavgi > img.image_i1yka2fr `div.image_irszz0x > div.picture_p1h9z2jq > picture.content_c19bavgi > img.image_i1yka2fr`	/https://imgix-proxy.n8s.jp/DSXZQO2893912014042026000000-...	25.2 KiB	21.8 KiB
ボスポラス海峡を通過するロシア船籍の原油タンカー=ロイター `div.image_irszz0x > div.picture_p1h9z2jq > picture.content_c19bavgi > img.image_i1yka2fr`	/https://imgix-proxy.n8s.jp/DSXZQO2899924015042026000000-...	25.0 KiB	21.6 KiB
第一三共ヘルスケアの「ロキソニンＳ」など `div.image_irszz0x > div.picture_p1h9z2jq > picture.content_c19bavgi > img.image_i1yka2fr`	/https://imgix-proxy.n8s.jp/DSXZQO2896557015042026000000-...	23.0 KiB	19.9 KiB
div.image_irszz0x > div.picture_p1h9z2jq > picture.content_c19bavgi > img.image_i1yka2fr `div.image_irszz0x > div.picture_p1h9z2jq > picture.content_c19bavgi > img.image_i1yka2fr`	/https://imgix-proxy.n8s.jp/DSXZQO2879173010042026000000-...	21.9 KiB	19.0 KiB
税制改正が働く人のランチ事情に変化をもたらしている `div.image_irszz0x > div.picture_p1h9z2jq > picture.content_c19bavgi > img.image_i1yka2fr`	/https://imgix-proxy.n8s.jp/DSXZQO2887782013042026000000-...	20.1 KiB	17.4 KiB
div.image_irszz0x > div.picture_p1h9z2jq > picture.content_c19bavgi > img.image_i1yka2fr `div.image_irszz0x > div.picture_p1h9z2jq > picture.content_c19bavgi > img.image_i1yka2fr`	/https://imgix-proxy.n8s.jp/DSXZQO2890922014042026000000-...	19.2 KiB	16.6 KiB
ホルムズ海峡の通過を目指す船舶は情勢に翻弄される（3月、アラブ首長国連邦東部ラス・アル・ハイマ）=ロイター `div.image_irszz0x > div.picture_p1h9z2jq > picture.content_c19bavgi > img.image_i1yka2fr`	/https://imgix-proxy.n8s.jp/DSXZQO2879376010042026000000-...	17.9 KiB	15.5 KiB
div.image_irszz0x > div.picture_p1h9z2jq > picture.content_c19bavgi > img.image_i1yka2fr `div.image_irszz0x > div.picture_p1h9z2jq > picture.content_c19bavgi > img.image_i1yka2fr`	/https://imgix-proxy.n8s.jp/DSXZQO2835358001042026000000-...	17.6 KiB	15.3 KiB
メルトリーが提供する「Days AI」では生成AIを使って自分のオリジナルキャラクター「うちの子」をつくって遊べる `div.picture_pvxcl1b > div.picture_p1h9z2jq > picture.content_c19bavgi > img.image_i1yka2fr`	/https://imgix-proxy.n8s.jp/DSXZQO2733237010032026000000-...	51.7 KiB	15.0 KiB
AI活用で大組織に勝つ　逆転の方法論 `div.normalStylesPictureContainer_n1mtmphx > div.picture_p1h9z2jq > picture.content_c19bavgi > img.image_i1yka2fr`	/https://imgix-proxy.n8s.jp/DSXZQO2890100014042026000000-...	19.6 KiB	14.7 KiB
a.imageAnchor_i1u6wsqb > div.picture_p1h9z2jq > picture.content_c19bavgi > img.image_i1yka2fr `a.imageAnchor_i1u6wsqb > div.picture_p1h9z2jq > picture.content_c19bavgi > img.image_i1yka2fr`	/https://imgix-proxy.n8s.jp/DSXZQO2863302008042026000000-...	30.1 KiB	13.8 KiB
div.image_irszz0x > div.picture_p1h9z2jq > picture.content_c19bavgi > img.image_i1yka2fr `div.image_irszz0x > div.picture_p1h9z2jq > picture.content_c19bavgi > img.image_i1yka2fr`	/https://imgix-proxy.n8s.jp/DSXZQO2778776019032026000000-...	15.0 KiB	13.0 KiB
日本経済新聞トップ `div.headerToolNavContainer_h1itz95y > div.head_hugy8te > a.headLogo_hniq3e8 > img.logoImage_likza8z`	www.nikkei.com/.resources/k-components/logo/masthead.rev-b8cf30e.png	9.4 KiB	7.5 KiB

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:3917.626 label:Time to first byte subpart:timeToFirstByte] map[duration:27.217 label:Resource load delay subpart:resourceLoadDelay] map[duration:89.016 label:Resource load duration subpart:resourceLoadDuration] map[duration:646.395 label:Element render delay subpart:elementRenderDelay]]

lhId: page-22-IMG

nodeLabel: ニューヨーク証券取引所（2015年）=ロイター

path: 1,HTML,1,BODY,8,DIV,0,DIV,0,MAIN,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,ARTICLE,1,DIV,1,DIV,0,PICTURE,3,IMG

selector: div.picture_p1typbfp > div.picture_p1h9z2jq > picture.content_c19bavgi > img.image_i1yka2fr

snippet: <img class="image_i1yka2fr fullSize_f124y32a" src="https://article-image-ix.nikkei.com/https%3A%2F%2Fimgix-proxy.n8s.jp%2FDSX…" alt="ニューヨーク証券取引所（2015年）=ロイター" srcset="https://article-image-ix.nikkei.com/https%3A%2F%2Fimgix-proxy.n8s.jp%2FDSX…">

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-22-IMG

nodeLabel: ニューヨーク証券取引所（2015年）=ロイター

path: 1,HTML,1,BODY,8,DIV,0,DIV,0,MAIN,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,ARTICLE,1,DIV,1,DIV,0,PICTURE,3,IMG

selector: div.picture_p1typbfp > div.picture_p1h9z2jq > picture.content_c19bavgi > img.image_i1yka2fr

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

value: No additional origins are good candidates for preconnecting

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.

URL	Transfer Size	Duration
www.nikkei.com/.resources/k2-top/main.rev-6000bdcd.css	25.9 KiB	150 ms

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

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: 892 ms

URL	Time Spent
nikkei.com/	892 ms
www.nikkei.com/	0.0 ms

Keep the server response time for the main document short because all other requests depend on it. Learn more about the Time to First Byte metric.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 3.0 s

URL	Time Spent
www.nikkei.com/	3.1 s

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

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

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: 300 ms 182.6 KiB

URL	Transfer Size	Est Savings
www.googletagmanager.com/gtag/js?id=AW-1024704716&cx=c&gtm=4e64e1h1&bs=ctrl2	144.2 KiB	55.5 KiB
www.googletagmanager.com/gtag/js?id=G-PXS8451SBG	173.3 KiB	55.1 KiB
www.nikkei.com/.resources/k2-top/main.rev-727ad7f4.js	104.0 KiB	39.6 KiB
connect.facebook.net/en_US/fbevents.js	96.3 KiB	32.4 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.

URL	Total CPU Time	Script Evaluation	Script Parse
www.nikkei.com/	2.2 s	21 ms	4.0 ms
Unattributable	1.1 s	37 ms	0.0 ms
www.googletagmanager.com/gtag/js?id=G-PXS8451SBG	620 ms	497 ms	69 ms
www.nikkei.com/.resources/k2-top/main.rev-727ad7f4.js	454 ms	414 ms	8.9 ms
www.nikkei.com/.resources/tracking/static/atlas/atj.min.rev-c6c444.js	370 ms	126 ms	2.8 ms
www.googletagmanager.com/gtag/js?id=AW-1024704716&cx=c&gtm=4e64e1h1&bs=ctrl2	321 ms	260 ms	52 ms
/signals/config/517132292271830?v=2.9.298&r=stable&domain...	171 ms	145 ms	24 ms
connect.facebook.net/en_US/fbevents.js	164 ms	119 ms	44 ms
/.resources/k-components/rtoaster/view.rev-e54ba78.html?d...	56 ms	31 ms	3.0 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.

Category	Time Spent
Style & Layout	1.9 s
Script Evaluation	1.9 s
Other	1.4 s
Script Parsing & Compilation	230 ms
Parse HTML & CSS	166 ms
Rendering	128 ms
Garbage Collection	27 ms

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: 0.0 ms 14.6 KiB

URL	Transfer Size	Est Savings
.k-button{-webkit-appearance:none;-moz-appearance:none;appearance:none;-webkit-tap-highlight-color:…	14.6 KiB	14.6 KiB

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.

URL	Transfer Size
partsa.nikkei.com/parts/ds/images/topic/banner_us_iran_tension_202602_sp.jpg	369.4 KiB
/v1/static/4504957054001/5591bd28-bbc6-4141-b67b-8b5b128e...	225.8 KiB
www.googletagmanager.com/gtag/js?id=G-PXS8451SBG	174.0 KiB
www.googletagmanager.com/gtag/js?id=AW-1024704716&cx=c&gtm=4e64e1h1&bs=ctrl2	144.3 KiB
www.nikkei.com/.resources/k2-top/main.rev-727ad7f4.js	133.7 KiB
/https://imgix-proxy.n8s.jp/DSXZQO2894794015042026000000-...	97.8 KiB
connect.facebook.net/en_US/fbevents.js	96.4 KiB
www.nikkei.com/	71.5 KiB
/https://imgix-proxy.n8s.jp/DSXZQO6767759004082025000000-...	55.7 KiB
/https://imgix-proxy.n8s.jp/DSXZQO2733237010032026000000-...	51.8 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
イラン軍事衝突　ニュース・解説はこちら `div.container_c199s2h > a.link_lp4r7xz > picture.picture_p1geunww > img`	partsa.nikkei.com/parts/ds/images/topic/banner_us_iran_tension_202602_sp.jpg
Think! `article.container_c1e5f6rx > div.textContainer_t1v5liye > div.metaContainer_mvb5xl6 > img.icon_i7atnwz`	www.nikkei.com/.resources/k-components/logo/think.rev-3b943d5.svg
Think! `div.container_c1ukjho0 > div.textContent_t6mnomz > div.metaContainer_mondcn1 > img.icon_ijft9l6`	www.nikkei.com/.resources/k-components/logo/think.rev-3b943d5.svg
Think! `div.container_c1ukjho0 > div.textContent_t6mnomz > div.metaContainer_mondcn1 > img.icon_ijft9l6`	www.nikkei.com/.resources/k-components/logo/think.rev-3b943d5.svg
Think! `div.container_c1ukjho0 > div.textContent_t6mnomz > div.metaContainer_mondcn1 > img.icon_ijft9l6`	www.nikkei.com/.resources/k-components/logo/think.rev-3b943d5.svg
Think! `li.textArticleList_t1qxhi24 > a.titleText_tnnopfn > span.metaContainer_m1xd4ucj > img.icon_i19xqikn`	www.nikkei.com/.resources/k-components/logo/think.rev-3b943d5.svg
Think! `div.container_c1ukjho0 > div.textContent_t6mnomz > div.metaContainer_mondcn1 > img.icon_ijft9l6`	www.nikkei.com/.resources/k-components/logo/think.rev-3b943d5.svg
PR `span.commonStylesMetaText_c1f6i0vj > span.prContainer_p1qo25si > i.iconStyle_i11t78hf > img`	www.nikkei.com/.resources/k-components/icon/pr.rev-3437e86.svg
PR `span.commonStylesMetaText_c1f6i0vj > span.prContainer_p1qo25si > i.iconStyle_i11t78hf > img`	www.nikkei.com/.resources/k-components/icon/pr.rev-3437e86.svg
会員限定記事 `div.textContainer_t1v5liye > h2.title_t7qfgoq > span.metaTags_m116cxpk > img.icon_i6435wp`	www.nikkei.com/.resources/k-components/icon/locked_square.rev-5fc2936.svg
会員限定記事 `div.titleArea_t1agme82 > h2.title_tlmhwm6 > span.metaTags_m116cxpk > img.icon_i6435wp`	www.nikkei.com/.resources/k-components/icon/locked_square.rev-5fc2936.svg
会員限定記事 `div.titleArea_t19567mm > h2.title_tl0evav > span.metaTags_m116cxpk > img.icon_i6435wp`	www.nikkei.com/.resources/k-components/icon/locked_square.rev-5fc2936.svg
会員限定記事 `div.titleArea_t19567mm > h2.title_tl0evav > span.metaTags_m116cxpk > img.icon_i6435wp`	www.nikkei.com/.resources/k-components/icon/locked_square.rev-5fc2936.svg
会員限定記事 `div.titleArea_t19567mm > h2.title_tl0evav > span.metaTags_m116cxpk > img.icon_i6435wp`	www.nikkei.com/.resources/k-components/icon/locked_square.rev-5fc2936.svg
会員限定記事 `div.titleArea_t19567mm > h2.title_tl0evav > span.metaTags_m116cxpk > img.icon_i6435wp`	www.nikkei.com/.resources/k-components/icon/locked_square.rev-5fc2936.svg
会員限定記事 `div.titleArea_t19567mm > h2.title_tl0evav > span.metaTags_m116cxpk > img.icon_i6435wp`	www.nikkei.com/.resources/k-components/icon/locked_square.rev-5fc2936.svg
会員限定記事 `div.titleArea_t19567mm > h2.title_tl0evav > span.metaTags_m116cxpk > img.icon_i6435wp`	www.nikkei.com/.resources/k-components/icon/locked_square.rev-5fc2936.svg
会員限定記事 `div.titleArea_t19567mm > h2.title_tl0evav > span.metaTags_m116cxpk > img.icon_i6435wp`	www.nikkei.com/.resources/k-components/icon/locked_square.rev-5fc2936.svg
会員限定記事 `div.titleArea_t19567mm > h2.title_tl0evav > span.metaTags_m116cxpk > img.icon_i6435wp`	www.nikkei.com/.resources/k-components/icon/locked_square.rev-5fc2936.svg
会員限定記事 `div.titleArea_t19567mm > h2.title_tl0evav > span.metaTags_m116cxpk > img.icon_i6435wp`	www.nikkei.com/.resources/k-components/icon/locked_square.rev-5fc2936.svg
会員限定記事 `a.titleText_tnnopfn > h2.title_t8xcrjm > span.metaTags_m116cxpk > img.icon_i6435wp`	www.nikkei.com/.resources/k-components/icon/locked_square.rev-5fc2936.svg
会員限定記事 `li.textArticleList_t1qxhi24 > a.titleText_tnnopfn > span.metaTags_m116cxpk > img.icon_i6435wp`	www.nikkei.com/.resources/k-components/icon/locked_square.rev-5fc2936.svg
会員限定記事 `li.textArticleList_t1qxhi24 > a.titleText_tnnopfn > span.metaTags_m116cxpk > img.icon_i6435wp`	www.nikkei.com/.resources/k-components/icon/locked_square.rev-5fc2936.svg
会員限定記事 `li.textArticleList_t1qxhi24 > a.titleText_tnnopfn > span.metaTags_m116cxpk > img.icon_i6435wp`	www.nikkei.com/.resources/k-components/icon/locked_square.rev-5fc2936.svg
会員限定記事 `a.titleText_tnnopfn > h2.title_t8xcrjm > span.metaTags_m116cxpk > img.icon_i6435wp`	www.nikkei.com/.resources/k-components/icon/locked_square.rev-5fc2936.svg
会員限定記事 `li.textArticleList_t1qxhi24 > a.titleText_tnnopfn > span.metaTags_m116cxpk > img.icon_i6435wp`	www.nikkei.com/.resources/k-components/icon/locked_square.rev-5fc2936.svg
会員限定記事 `li.textArticleList_t1qxhi24 > a.titleText_tnnopfn > span.metaTags_m116cxpk > img.icon_i6435wp`	www.nikkei.com/.resources/k-components/icon/locked_square.rev-5fc2936.svg
会員限定記事 `li.textArticleList_t1qxhi24 > a.titleText_tnnopfn > span.metaTags_m116cxpk > img.icon_i6435wp`	www.nikkei.com/.resources/k-components/icon/locked_square.rev-5fc2936.svg
会員限定記事 `div.textContainer_ta98o9y > h2.title_te6hgf2 > span.metaTags_m116cxpk > img.icon_i6435wp`	www.nikkei.com/.resources/k-components/icon/locked_square.rev-5fc2936.svg
会員限定記事 `div.titleArea_t19567mm > h2.title_tl0evav > span.metaTags_m116cxpk > img.icon_i6435wp`	www.nikkei.com/.resources/k-components/icon/locked_square.rev-5fc2936.svg
会員限定記事 `div.titleArea_t19567mm > h2.title_tl0evav > span.metaTags_m116cxpk > img.icon_i6435wp`	www.nikkei.com/.resources/k-components/icon/locked_square.rev-5fc2936.svg
会員限定記事 `div.textContainer_ta98o9y > h2.title_te6hgf2 > span.metaTags_m116cxpk > img.icon_i6435wp`	www.nikkei.com/.resources/k-components/icon/locked_square.rev-5fc2936.svg
会員限定記事 `div.titleArea_t19567mm > h2.title_tl0evav > span.metaTags_m116cxpk > img.icon_i6435wp`	www.nikkei.com/.resources/k-components/icon/locked_square.rev-5fc2936.svg
会員限定記事 `div.titleArea_t19567mm > h2.title_tl0evav > span.metaTags_m116cxpk > img.icon_i6435wp`	www.nikkei.com/.resources/k-components/icon/locked_square.rev-5fc2936.svg
会員限定記事 `div.textContainer_ta98o9y > h2.title_te6hgf2 > span.metaTags_m116cxpk > img.icon_i6435wp`	www.nikkei.com/.resources/k-components/icon/locked_square.rev-5fc2936.svg
会員限定記事 `div.titleArea_t19567mm > h2.title_tl0evav > span.metaTags_m116cxpk > img.icon_i6435wp`	www.nikkei.com/.resources/k-components/icon/locked_square.rev-5fc2936.svg
会員限定記事 `div.titleArea_t19567mm > h2.title_tl0evav > span.metaTags_m116cxpk > img.icon_i6435wp`	www.nikkei.com/.resources/k-components/icon/locked_square.rev-5fc2936.svg
動画あり `div.titleArea_t19567mm > h2.title_tl0evav > span.metaTags_m116cxpk > img.icon_i6435wp`	www.nikkei.com/.resources/k-components/icon/video.rev-631012e.svg

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

●Forced reflow

●Modern HTTP

●Optimize viewport for mobile

●Minify CSS

●Minify JavaScript

●User Timing marks and measures 14 user timings

●Avoid long main-thread tasks 11 long tasks found

●Page didn't prevent back/forward cache restoration

●Network Requests

●Network Round Trip Times 220 ms

●Server Backend Latencies 640 ms

●Tasks

●Diagnostics

●Metrics

●Screenshot Thumbnails

●Final Screenshot

●Script Treemap Data

●Resources Summary

●Avoid large layout shifts 1 layout shift found

○INP breakdown

○Avoid non-composited animations

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.

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
お申し込み `nav.headNavs_h1men6qz > k2-kite-header-account-nav.accountNav_a1i8t0o1 > a.accountNavItem_a1pb0gw3 > span.buttonText_bhlvih7`
九州大学大学院比較社会文化研究院　教授 `div.content_c1489jjx > a.container_cbbf1ny > span.indent_iiuxb5w > span.headline_h1axq0vo`
チームボックス代表取締役/元早稲田大学ラグビー部監督 `div.content_c1489jjx > a.container_cbbf1ny > span.indent_iiuxb5w > span.headline_h1axq0vo`
UBS証券　シニアアナリスト/コンシューマー・セクタージャパン・ヘッド `div.content_c1489jjx > a.container_cbbf1ny > span.indent_iiuxb5w > span.headline_h1axq0vo`

These are opportunities to improve the legibility of your content.

Names and labels

Link text (and alternate text for images, when used as links) that is discernible, unique, and focusable improves the navigation experience for screen reader users. Learn how to make links accessible.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
div.cardOuterContainer_cnjf2s0 > div.cardInnerContainer_cmocufx > div.cardContent_cng6c8a > a.imageAnchor_i1u6wsqb `div.cardOuterContainer_cnjf2s0 > div.cardInnerContainer_cmocufx > div.cardContent_cng6c8a > a.imageAnchor_i1u6wsqb`
div.cardOuterContainer_cnjf2s0 > div.cardInnerContainer_cmocufx > div.cardContent_cng6c8a > a.imageAnchor_i1u6wsqb `div.cardOuterContainer_cnjf2s0 > div.cardInnerContainer_cmocufx > div.cardContent_cng6c8a > a.imageAnchor_i1u6wsqb`
div.cardOuterContainer_cnjf2s0 > div.cardInnerContainer_cmocufx > div.cardContent_cng6c8a > a.imageAnchor_i1u6wsqb `div.cardOuterContainer_cnjf2s0 > div.cardInnerContainer_cmocufx > div.cardContent_cng6c8a > a.imageAnchor_i1u6wsqb`
div.cardOuterContainer_cnjf2s0 > div.cardInnerContainer_cmocufx > div.cardContent_cng6c8a > a.imageAnchor_i1u6wsqb `div.cardOuterContainer_cnjf2s0 > div.cardInnerContainer_cmocufx > div.cardContent_cng6c8a > a.imageAnchor_i1u6wsqb`
div.card_c1n1wn9q > div.wrapper_wkoog9o > div.contents_cgvemjo > a.imageArea_iyrsl9h `div.card_c1n1wn9q > div.wrapper_wkoog9o > div.contents_cgvemjo > a.imageArea_iyrsl9h`
div.card_c1n1wn9q > div.wrapper_wkoog9o > div.contents_cgvemjo > a.imageArea_iyrsl9h `div.card_c1n1wn9q > div.wrapper_wkoog9o > div.contents_cgvemjo > a.imageArea_iyrsl9h`

These are opportunities to improve the semantics of the controls in your application. This may enhance the experience for users of assistive technology, like a screen reader.

Best practices

Touch targets with sufficient size and spacing help users who may have difficulty targeting small controls to activate the targets. Learn more about touch targets.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
お申し込み `div.head_hugy8te > nav.headNavs_h1men6qz > k2-kite-header-account-nav.accountNav_a1i8t0o1 > a.accountNavItem_a1pb0gw3`
ログイン `div.head_hugy8te > nav.headNavs_h1men6qz > k2-kite-header-account-nav.accountNav_a1i8t0o1 > a.accountNavItem_a1pb0gw3`

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
エプソン、新中計に高まらぬ期待「引き算」不足のROIC経営 `article.container_clrflg9 > div.textContainer_t10uyfy9 > div.articleContainer_axihtka > a.titleText_tnnopfn`
OpenAI、ノルウェーでAIインフラ投資計画「スターゲート」撤退 `div.textArticleContainer_tud1wi2 > ul > li.textArticleList_t1qxhi24 > a.titleText_tnnopfn`
三菱マテが小名浜で銅鉱石由来の製錬停止非鉄大手が探る3つの生存策 `div.textArticleContainer_tud1wi2 > ul > li.textArticleList_t1qxhi24 > a.titleText_tnnopfn`
千葉銀・米本頭取、ROE向上なら「県外再編も選択肢」首都圏を重視 `div.textArticleContainer_tud1wi2 > ul > li.textArticleList_t1qxhi24 > a.titleText_tnnopfn`
トレーディング業務で米銀大もうけ規制緩和の追い風 `article.container_clrflg9 > div.textContainer_t10uyfy9 > div.articleContainer_axihtka > a.titleText_tnnopfn`
日経平均株価、米イラン交渉の進展期待が追い風（先読み株式相場） `div.textArticleContainer_tud1wi2 > ul > li.textArticleList_t1qxhi24 > a.titleText_tnnopfn`
スニーカー企業がAI企業に「くら替え」米オールバーズ株7倍に急騰 `div.textArticleContainer_tud1wi2 > ul > li.textArticleList_t1qxhi24 > a.titleText_tnnopfn`
拡大するFX投資3月の建玉残高は過去最高、中東緊迫で取引活発 `div.textArticleContainer_tud1wi2 > ul > li.textArticleList_t1qxhi24 > a.titleText_tnnopfn`

○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]`s are contained by their required parent element

●`[role]` values are valid

●`[aria-*]` attributes have valid values

●`[aria-*]` attributes are valid and not misspelled

●Buttons have an accessible name

●Image elements have `[alt]` attributes

●`[user-scalable="no"]` is not used in the `<meta name="viewport">` element and the `[maximum-scale]` attribute is not less than 5.

●ARIA attributes are used as specified for the element's role

●Elements use only permitted ARIA attributes

●Document has a `<title>` element

●`<html>` element has a `[lang]` attribute

●`<html>` element has a valid value for its `[lang]` attribute

●Lists contain only `<li>` elements and script supporting elements (`<script>` and `<template>`).

●List items (`<li>`) are contained within `<ul>`, `<ol>` or `<menu>` parent elements

●No element has a `[tabindex]` value greater than 0

●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

○`button`, `link`, and `menuitem` elements have accessible names

○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.

○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

○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

○`<frame>` or `<iframe>` elements have a title

○`<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

○Links are distinguishable without relying on color.

○The document does not use `<meta http-equiv="refresh">`

○`<object>` elements have alternate text

○Select elements have associated label elements.

○Skip links are focusable.

○Cells in a `<table>` element that use the `[headers]` attribute refer to table cells within the same table.

○`<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.

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 / Warning	Source
AttributionReporting	connect.facebook.net/en_US/fbevents.js line 279, col 769

●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 browser errors logged to the console

●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`