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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.

35

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.

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:32.509 source:map[column:3936 line:17 type:source-location url:https://www.softbank.jp/site/set/data/top/js/s/2026/index.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:2.112 source:map[column:31280 line:15 type:source-location url:https://www.softbank.jp/site/set/data/top/js/s/2026/index.js urlProvider:network]] map[reflowTime:1.818 source:map[column:28941 line:15 type:source-location url:https://www.softbank.jp/site/set/data/top/js/s/2026/index.js urlProvider:network]] map[reflowTime:28.579 source:map[column:5951 line:16 type:source-location url:https://www.softbank.jp/site/set/data/top/js/s/2026/index.js urlProvider:network]] map[reflowTime:94.604 source:map[type:text value:[unattributed]]] map[reflowTime:103.888 source:map[column:42694 line:15 type:source-location url:https://www.softbank.jp/site/set/data/top/js/s/2026/index.js urlProvider:network]] map[reflowTime:10.157 source:map[column:27368 line:8 type:source-location url:https://www.softbank.jp/site/set/data/top/js/s/2026/index.js urlProvider:network]] map[reflowTime:0.546 source:map[column:44073 line:15 type:source-location url:https://www.softbank.jp/site/set/data/top/js/s/2026/index.js urlProvider:network]] map[reflowTime:0.063 source:map[column:44024 line:15 type:source-location url:https://www.softbank.jp/site/set/data/top/js/s/2026/index.js urlProvider:network]]]

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
デジタル技術で守る未来の林業。徳島県で「NatureBank」の森づくりがスタート div.top-page-carousel-05_list > div.top-page-carousel-05_list-item > a.top-page-carousel-05_link > img.top-page-carousel-05_image
/image/scale/af073f3201b5c6f66ec4188b57b38fe3b88eb5ed/bac...2.5 MiB2.4 MiB
スマホから飛び出る “推し” を独り占め！ 「トビデル」で新感覚の3D推し活を体験 div.top-page-carousel-05_list > div.top-page-carousel-05_list-item > a.top-page-carousel-05_link > img.top-page-carousel-05_image
/image/scale/d2496a84d432be52c2ae37715d413ca80b3ea10f/bac...1.9 MiB1.9 MiB
“音声の日記” 感覚で、その瞬間のノリを記録。高校生の間で広がる音声SNS「day」のリアルな楽しみ方 div.top-page-carousel-05_list > div.top-page-carousel-05_list-item > a.top-page-carousel-05_link > img.top-page-carousel-05_image
/image/scale/0a95f9d95f5696e06b862c2d3407d21896958d26/bac...1.4 MiB1.4 MiB
水戸黄門ゆかりの地、袋田の滝、海鮮… 茨城県の魅力をプレゼン！ 「Google Pixel プロダクトスペシャリスト」と巡る観光スポット div.top-page-carousel-05_list > div.top-page-carousel-05_list-item > a.top-page-carousel-05_link > img.top-page-carousel-05_image
/image/scale/aa7df24c9cb4d25a41567d8be4c6510c37ff7170/bac...489.8 KiB468.2 KiB
スポーツ スポーツの感動を、社会の力に変える バスケットLIVE D.LEAGUE main.contents-area > section.top-page-section-01 > div.top-page-layout-col2 > section.top-page-layout-col2_item
www.softbank.jp/site/set/data/top/img/s/2026/img-initiatives-03.webp?20260410507.0 KiB412.0 KiB
勝ち続けるためのデータ活用。福岡ソフトバンクホークスの強さの仕組み div.top-page-carousel-05_list > div.top-page-carousel-05_list-item > a.top-page-carousel-05_link > img.top-page-carousel-05_image
/image/scale/66f8c8b5a32f1b5ef664636f83b4f2d7a49c8c83/bac...409.1 KiB387.5 KiB
気になるAIを選んで簡単に画像や音楽が作れる。初めてのAI体験におススメの超入門サービス「だれでもAI」 div.top-page-carousel-05_list > div.top-page-carousel-05_list-item > a.top-page-carousel-05_link > img.top-page-carousel-05_image
/image/scale/d821277645f846ec2ceb9a8acadb7c6392738c04/bac...350.2 KiB328.6 KiB
陸路が寸断された被災地域に上空から通信を。ヘリコプター搭載型DRUの実用性を高知県黒潮町で実証 div.top-page-carousel-05_list > div.top-page-carousel-05_list-item > a.top-page-carousel-05_link > img.top-page-carousel-05_image
/image/scale/7976270a8f8652a74cb1c28d3dadb058762f2548/bac...342.5 KiB320.9 KiB
AIネイティブ時代を支える社会インフラへ。AI-RANの取り組みを世界最大級のモバイル関連展示会「MWC 2026」で紹介 div.top-page-carousel-05_list > div.top-page-carousel-05_list-item > a.top-page-carousel-05_link > img.top-page-carousel-05_image
/image/scale/805c93be8b8de3252ca52d6d0f4dc2592691fdaa/bac...311.1 KiB289.5 KiB
自己紹介から会話ネタ、生活準備まで。AIを新生活の助っ人に div.top-page-carousel-05_list > div.top-page-carousel-05_list-item > a.top-page-carousel-05_link > img.top-page-carousel-05_image
/image/scale/c7381476e61535f8d93b6c06d630cbd60438e326/bac...295.2 KiB273.6 KiB
災害による孤立地域の通信を船から確保。弓削商船高専とソフトバンクが災害時連携協定を締結 div.top-page-carousel-05_list > div.top-page-carousel-05_list-item > a.top-page-carousel-05_link > img.top-page-carousel-05_image
/image/scale/9d1600cd1a5ad440a80a1cdfedb02a57b66b06c4/bac...289.8 KiB268.2 KiB
降り続く雪と、鳴り止まない除雪要請。AI音声変換サービス「SoftVoice」が電話応対する職員の心の盾に div.top-page-carousel-05_list > div.top-page-carousel-05_list-item > a.top-page-carousel-05_link > img.top-page-carousel-05_image
/image/scale/f6c662f0eab994eae5e342407e44d8cb94c932ec/bac...288.2 KiB266.6 KiB
三重県をデジタル活用の実証フィールドに。環境保全や防災・交通課題に挑む包括連携協定を締結 div.top-page-carousel-05_list > div.top-page-carousel-05_list-item > a.top-page-carousel-05_link > img.top-page-carousel-05_image
/image/scale/5aef0477ff319257176c7c9f01997be2e62f2e5e/bac...277.8 KiB256.2 KiB
“圏外” を “つながるエリア” に。衛星通信サービス「SoftBank Starlink Direct」実用化までの軌跡 div.top-page-carousel-05_list > div.top-page-carousel-05_list-item > a.top-page-carousel-05_link > img.top-page-carousel-05_image
/image/scale/495a0ad89135eb160ce2c1076dcc7b3cac41859f/bac...274.2 KiB252.6 KiB
サービスを使うだけ。ソフトバンクの森づくりの仕組み。 div.top-page-carousel-01_list > div.top-page-carousel-01_list-item > a.top-page-carousel-01_link > img.top-page-carousel-01_image
/site/set/data/top/img/shared/2026/top-page-carousel-01_l...276.7 KiB245.8 KiB
サービスを使うだけ。ソフトバンクの森づくりの仕組み。 div.top-page-carousel-01_list > div.top-page-carousel-01_list-item > a.top-page-carousel-01_link > img.top-page-carousel-01_image
/site/set/data/top/img/shared/2026/top-page-carousel-01_l...276.7 KiB245.8 KiB
さらに幅広い分野でDXやAI活用を推進。地域活性化を目指す包括連携協定を宮崎県と締結 div.top-page-carousel-05_list > div.top-page-carousel-05_list-item > a.top-page-carousel-05_link > img.top-page-carousel-05_image
/image/scale/c7d2203353bc1210e052c2741f2d455ddc5f15b8/bac...263.9 KiB242.3 KiB
AI革命の新たな同志に。約950名の新入社員がソフトバンクグループに仲間入り div.top-page-carousel-05_list > div.top-page-carousel-05_list-item > a.top-page-carousel-05_link > img.top-page-carousel-05_image
/image/scale/8241db2b96ca7a0450e99814c34522203f2d247a/bac...261.1 KiB239.5 KiB
「空が見えたら、圏外でも、日本中つながる。」普段使いのスマホで衛星通信ができる仕組みを解説 div.top-page-carousel-05_list > div.top-page-carousel-05_list-item > a.top-page-carousel-05_link > img.top-page-carousel-05_image
/image/scale/3d9d5068b503ccd691a3a9151eda26fcb34d2054/bac...259.1 KiB237.5 KiB
海外旅行が “追加料金なし” でより快適に。「海外データ放題」でストレスフリーな旅を div.top-page-carousel-05_list > div.top-page-carousel-05_list-item > a.top-page-carousel-05_link > img.top-page-carousel-05_image
/image/scale/6f1c09bd50162f5d5307c4e28c6ce3fac1385fd1/bac...254.9 KiB233.3 KiB
地域の未来を支える財産に。DX人材の育成をさらに推進する連携協定を徳島県と締結 div.top-page-carousel-05_list > div.top-page-carousel-05_list-item > a.top-page-carousel-05_link > img.top-page-carousel-05_image
/image/scale/8ba70f6a5df64b564dad4326bb9ce8f38ea64801/bac...243.0 KiB221.4 KiB
AIを全ての人の “日常の道具” に。「Natural AI Phone」など、AI製品・サービスを発表 div.top-page-carousel-05_list > div.top-page-carousel-05_list-item > a.top-page-carousel-05_link > img.top-page-carousel-05_image
/image/scale/6c719e3d5956a53d166332c6e5c575c33218bf16/bac...217.0 KiB195.4 KiB
日本も、世界も、もっとつなげる。「SoftBank Starlink Direct」など新サービス・新料金を発表 div.top-page-carousel-05_list > div.top-page-carousel-05_list-item > a.top-page-carousel-05_link > img.top-page-carousel-05_image
/image/scale/806b4de25474113243de3ecb2ce3dbead02f0585/bac...207.9 KiB186.3 KiB
安全・快適な林業現場へ。山間部にWi-Fiエリアを構築する広域衛星通信サービス「SatPack」 div.top-page-carousel-05_list > div.top-page-carousel-05_list-item > a.top-page-carousel-05_link > img.top-page-carousel-05_image
/image/scale/bc0a200fa9a3f4a64f8d55b71c89beea6bea6f1c/bac...201.1 KiB179.5 KiB
憧れのDリーグデビューへ。新チームオーディション最終審査目前のプロデューサーと候補生が語るリアルな心境 div.top-page-carousel-05_list > div.top-page-carousel-05_list-item > a.top-page-carousel-05_link > img.top-page-carousel-05_image
/image/scale/10c004f0d4b7f0f57c240866c7403301231d461b/bac...183.7 KiB162.1 KiB
AIとアナログを融合した育成プログラムが評価。「あんしんショップ大賞2025」でソフトバンク市ヶ谷が総務大臣賞を受賞 div.top-page-carousel-05_list > div.top-page-carousel-05_list-item > a.top-page-carousel-05_link > img.top-page-carousel-05_image
/image/scale/0bf4b0b69f0420836dbc7f868aa0e22b07731d92/bac...177.1 KiB156.2 KiB
経済産業省と東京証券取引所が選ぶ、令和7年度「Nextなでしこ 共働き・共育て支援企業」にソフトバンクが初選定　 div.top-page-carousel-05_list > div.top-page-carousel-05_list-item > a.top-page-carousel-05_link > img.top-page-carousel-05_image
/image/scale/dc03b62b590b1614d2d90ffcb82b459749414a01/bac...176.4 KiB155.6 KiB
AIが相（AI）棒に。ユーザーの意図をAIが理解して、次のアクションを提案する「Natural AI Phone」 div.top-page-carousel-05_list > div.top-page-carousel-05_list-item > a.top-page-carousel-05_link > img.top-page-carousel-05_image
/image/scale/47b0198d42afe8fc6d3dabe4fd74338004a7ec57/bac...170.8 KiB150.7 KiB
AI変革は構想から実装へ。自律型AIエージェントプラットフォーム「AGENTIC STAR」が実現する企業の競争力 div.top-page-carousel-05_list > div.top-page-carousel-05_list-item > a.top-page-carousel-05_link > img.top-page-carousel-05_image
/image/scale/0bd42cef7f5809758b95f108c86c3e72dd1e76f7/bac...170.3 KiB150.2 KiB
早期発見の鍵は “BLEタグとスマホ”。共助型の見守りサービスが香川県高松市で先行展開 div.top-page-carousel-05_list > div.top-page-carousel-05_list-item > a.top-page-carousel-05_link > img.top-page-carousel-05_image
/image/scale/3b09f36e6cee7f2026fb581486f1549998489547/bac...159.6 KiB140.7 KiB
AIエージェントを実装したPepper、今度はパンのソムリエに！？ 見た目や会話からおススメ商品を提案する驚きの接客力 div.top-page-carousel-05_list > div.top-page-carousel-05_list-item > a.top-page-carousel-05_link > img.top-page-carousel-05_image
/image/scale/bf71c7798da993f42401ed110483a2379c6eb88b/bac...132.4 KiB116.8 KiB
AIはただの”道具”ではなく、もっと人に寄り添う存在へ。 div.top-page-carousel-01_list > div.top-page-carousel-01_list-item > a.top-page-carousel-01_link > img.top-page-carousel-01_image
/site/set/data/top/img/shared/2026/top-page-carousel-01_l...126.5 KiB95.8 KiB
AIはただの”道具”ではなく、もっと人に寄り添う存在へ。 div.top-page-carousel-01_list > div.top-page-carousel-01_list-item > a.top-page-carousel-01_link > img.top-page-carousel-01_image
/site/set/data/top/img/shared/2026/top-page-carousel-01_l...126.5 KiB95.8 KiB
メンタルは “性格” ではなく “スキル”。福岡ソフトバンクホークスの躍進を支えた「集中を戻す力」 div.top-page-carousel-05_list > div.top-page-carousel-05_list-item > a.top-page-carousel-05_link > img.top-page-carousel-05_image
/image/scale/8a701d6469642433f5c5706c04545acc7167f9a0/bac...108.1 KiB95.3 KiB
衛星通信で生活はどう変わる？ 「SoftBank Starlink Direct」がもたらすスマホライフ div.top-page-carousel-05_list > div.top-page-carousel-05_list-item > a.top-page-carousel-05_link > img.top-page-carousel-05_image
/image/scale/8509fa4cc62c16d41e068d5f179860196b464f02/bac...106.1 KiB93.6 KiB
ネットワーク 日本も、世界も、もっとつなげる。 SoftBank Starlink Direct UTX main.contents-area > section.top-page-section-01 > div.top-page-layout-col2 > section.top-page-layout-col2_item
www.softbank.jp/site/set/data/top/img/shared/2026/img-initiatives-04.webp228.7 KiB56.1 KiB
ITの力でスポーツの喜びや感動を多くの人に伝えたい。 div.top-page-carousel-01_list > div.top-page-carousel-01_list-item > a.top-page-carousel-01_link > img.top-page-carousel-01_image
www.softbank.jp/site/set/data/top/img/shared/2026/bnr_sports20260410.webp57.5 KiB40.8 KiB
ITの力でスポーツの喜びや感動を多くの人に伝えたい。 div.top-page-carousel-01_list > div.top-page-carousel-01_list-item > a.top-page-carousel-01_link > img.top-page-carousel-01_image
www.softbank.jp/site/set/data/top/img/shared/2026/bnr_sports20260410.webp57.5 KiB40.8 KiB
地上から宇宙まで、ソフトバンクが目指すネットワークの未来 div.top-page-carousel-01_list > div.top-page-carousel-01_list-item > a.top-page-carousel-01_link > img.top-page-carousel-01_image
/site/set/data/top/img/shared/2026/top-page-carousel-01_l...40.1 KiB28.5 KiB
地上から宇宙まで、ソフトバンクが目指すネットワークの未来 div.top-page-carousel-01_list > div.top-page-carousel-01_list-item > a.top-page-carousel-01_link > img.top-page-carousel-01_image
/site/set/data/top/img/shared/2026/top-page-carousel-01_l...40.1 KiB28.5 KiB
未来を想い、いま動く。社会課題を解決する取り組みとは。 div.top-page-carousel-01_list > div.top-page-carousel-01_list-item > a.top-page-carousel-01_link > img.top-page-carousel-01_image
/site/set/data/top/img/shared/2026/top-page-carousel-01_l...38.8 KiB27.5 KiB
未来を想い、いま動く。社会課題を解決する取り組みとは。 div.top-page-carousel-01_list > div.top-page-carousel-01_list-item > a.top-page-carousel-01_link > img.top-page-carousel-01_image
/site/set/data/top/img/shared/2026/top-page-carousel-01_l...38.8 KiB27.5 KiB
日本も、世界も、もっとつなげる div.top-page-carousel-01_list > div.top-page-carousel-01_list-item > a.top-page-carousel-01_link > img.top-page-carousel-01_image
www.softbank.jp/site/set/data/top/img/shared/2026/bnr_network20260410.webp33.8 KiB24.0 KiB
日本も、世界も、もっとつなげる div.top-page-carousel-01_list > div.top-page-carousel-01_list-item > a.top-page-carousel-01_link > img.top-page-carousel-01_image
www.softbank.jp/site/set/data/top/img/shared/2026/bnr_network20260410.webp33.8 KiB24.0 KiB
AI AIを社会インフラに、 未来のあたりまえをつくる Perplexity Pro だれでもAI main.contents-area > section.top-page-section-01 > div.top-page-layout-col2 > section.top-page-layout-col2_item
www.softbank.jp/site/set/data/top/img/shared/2026/img-initiatives-02.webp188.6 KiB7.6 KiB
div.top-page-menu-section > div.top-page-menu-icons-row > a.top-page-menu-item > div.top-page-menu-icon div.top-page-menu-section > div.top-page-menu-icons-row > a.top-page-menu-item > div.top-page-menu-icon
www.softbank.jp/site/set/data/top/img/shared/2026/icon-internet-worldmenu.webp8.6 KiB6.6 KiB
div.top-page-menu-section > div.top-page-menu-icons-row > a.top-page-menu-item > div.top-page-menu-icon div.top-page-menu-section > div.top-page-menu-icons-row > a.top-page-menu-item > div.top-page-menu-icon
www.softbank.jp/site/set/data/top/img/shared/2026/icon-network-worldmenu.webp7.3 KiB5.4 KiB

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-41-IMG
nodeLabel: 未来を想い、いま動く。社会課題を解決する取り組みとは。
path: 1,HTML,1,BODY,0,DIV,2,DIV,0,DIV,4,MAIN,2,SECTION,0,DIV,1,DIV,0,DIV,0,DIV,8,DIV,0,A,0,IMG
selector: div.top-page-carousel-01_list > div.top-page-carousel-01_list-item > a.top-page-carousel-01_link > img.top-page-carousel-01_image
snippet: <img data-src="/site/set/data/top/img/shared/2026/top-page-carousel-01_list-item-01.webp" alt="未来を想い、いま動く。社会課題を解決する取り組みとは。" class="top-page-carousel-01_image mainvisual-carousel_image js-copyguard" src="https://www.softbank.jp/site/set/data/top/img/shared/2026/top-page-carouse…">

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.softbank.jp/site/set/data/top/css/s/2026/index.css27.0 KiB151 ms
www.softbank.jp/site/set/common/ticker/v3/s/css/index.css5.8 KiB
www.softbank.jp/site/set/data/top/css/s/2026/index.u96.css618 B
www.softbank.jp/site/set/common/info/v1/s/css/index.css15.2 KiB
www.softbank.jp/site/set/common/shared/css/reset/reset-v2.css1.1 KiB151 ms
www.softbank.jp/-/media/sb/sjp/scassets/system/common/js/include.js1.0 KiB
www.softbank.jp/site/set/data/top/css/shared/2026/index.u96.css473 B

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
/uploads/production/survin/script/23/survin.js0.0 ms625.1 KiB
t.contentsquare.net/uxa/12bfe507f39ec.js900.0 s152.2 KiB
cdn.eu.heap-api.com/v5/heapjs-static/5.3.12/core/heap.js0.0 ms75.1 KiB
cdn-edge.karte.io/__edge_plugins/context_event/index.js10.0 s27.3 KiB
cdn-edge.karte.io/f87097bd64af36ecf120e298d69ebd15/edge.js10.0 s14.6 KiB
static.hj.contentsquare.net/c/hotjar-6471157.js60.0 s6.2 KiB
hm.mieru-ca.com/service/js/mieruca-hm.js?v=17768170667850.0 ms5.8 KiB
cdn-edge.karte.io/__edge_plugins/blitz_action_runner/index.js10.0 s5.0 KiB
cdn.us.heap-api.com/config/3618878549/heap_config.js120.0 s1.1 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: 1.3 s
URLTime Spent
softbank.jp/1.3 s
www.softbank.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

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 33.0 KiB
URLTransfer SizeEst Savings
www.softbank.jp/site/set/data/top/css/s/2026/index.css26.6 KiB20.1 KiB
www.softbank.jp/site/set/common/info/v1/s/css/index.css14.9 KiB12.9 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: 760 ms 1.0 MiB
URLTransfer SizeEst Savings
/uploads/production/survin/script/23/survin.js624.7 KiB331.6 KiB
t.contentsquare.net/uxa/12bfe507f39ec.js151.7 KiB73.5 KiB
www.googletagmanager.com/gtm.js?id=GTM-TNDFTGNX&gtm=4e64h1173.3 KiB73.1 KiB
www.googletagmanager.com/gtm.js?id=GTM-54HJTVSQ&gtm=4e64h1171.8 KiB70.6 KiB
www.googletagmanager.com/gtm.js?id=GTM-P8N6VWTZ&gtm=4e64h1174.7 KiB70.5 KiB
www.googletagmanager.com/gtm.js?id=GTM-MPWDW7WF&gtm=4e64h1116.2 KiB68.6 KiB
www.googletagmanager.com/gtm.js?id=GTM-MRJVDLW7&gtm=4e64h1168.7 KiB67.0 KiB
www.googletagmanager.com/gtag/js?id=G-4MD1NXTN7F&cx=c&gtm=4e64h1154.0 KiB64.1 KiB
www.googletagmanager.com/gtm.js?id=GTM-BMSW190.2 KiB59.9 KiB
www.googletagmanager.com/gtm.js?id=GTM-W6RH4KH&gtm=4e64h1127.4 KiB56.3 KiB
www.softbank.jp/site/set/common/disaster/v2/shared/js/catastrophe.js?2025012154.1 KiB44.0 KiB
cdn.eu.heap-api.com/v5/heapjs-static/5.3.12/core/heap.js74.7 KiB29.0 KiB
www.softbank.jp/site/set/data/top/js/s/2026/index.js64.3 KiB28.0 KiB
www.softbank.jp/site/set/common/shared/js/jquery-3.6.1.min.js38.9 KiB27.9 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
t.contentsquare.net/uxa/12bfe507f39ec.js5.6 s5.1 s72 ms
www.softbank.jp/site/set/data/top/js/s/2026/index.js4.2 s1.2 s21 ms
www.softbank.jp/1.9 s7.4 ms3.2 ms
Unattributable1.2 s88 ms0.0 ms
www.googletagmanager.com/gtm.js?id=GTM-BMSW1.2 s1.0 s86 ms
www.googletagmanager.com/gtag/js?id=G-4MD1NXTN7F&cx=c&gtm=4e64h1323 ms261 ms60 ms
www.googletagmanager.com/gtm.js?id=GTM-W6RH4KH&gtm=4e64h1317 ms254 ms58 ms
www.googletagmanager.com/gtm.js?id=GTM-54HJTVSQ&gtm=4e64h1306 ms168 ms79 ms
www.googletagmanager.com/gtm.js?id=GTM-P8N6VWTZ&gtm=4e64h1288 ms203 ms82 ms
cdn.eu.heap-api.com/v5/heapjs-static/5.3.12/core/heap.js279 ms238 ms40 ms
www.googletagmanager.com/gtm.js?id=GTM-MRJVDLW7&gtm=4e64h1262 ms188 ms73 ms
/uploads/production/survin/script/23/survin.js261 ms185 ms75 ms
www.googletagmanager.com/gtm.js?id=GTM-TNDFTGNX&gtm=4e64h1229 ms152 ms75 ms
www.softbank.jp/site/set/common/disaster/v2/shared/js/catastrophe.js?20250121144 ms28 ms17 ms
www.googletagmanager.com/gtm.js?id=GTM-MPWDW7WF&gtm=4e64h1139 ms97 ms40 ms
cdn-edge.karte.io/f87097bd64af36ecf120e298d69ebd15/edge.js90 ms78 ms7.5 ms
www.softbank.jp/site/set/common/info/v1/shared/js/index.js85 ms49 ms14 ms
www.softbank.jp/site/set/common/shared/js/jquery-3.6.1.min.js57 ms41 ms12 ms
cdn.treasuredata.com/sdk/3.1.4/td.min.js52 ms42 ms8.0 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.

CategoryTime Spent
Script Evaluation9.5 s
Other3.6 s
Style & Layout2.4 s
Script Parsing & Compilation831 ms
Rendering499 ms
Garbage Collection128 ms
Parse HTML & CSS74 ms

Many navigations are performed by going back to a previous page, or forwards again. The back/forward cache (bfcache) can speed up these return navigations. Learn more about the bfcache

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failure reasonFailure type
Pages with cache-control:no-store header cannot enter back/forward cache.Actionable
Pages whose main resource has cache-control:no-store cannot enter back/forward cache.Not actionable
Back/forward cache is disabled because some JavaScript network request received resource with Cache-Control: no-store header.Not actionable
Back/forward cache is disabled because WebSocket has been used.Not actionable

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: 0.0 ms 6.3 KiB
URLTransfer SizeEst Savings
cdn-edge.karte.io/__edge_plugins/context_event/index.js27.0 KiB6.3 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.

URLTransfer Size
/image/scale/af073f3201b5c6f66ec4188b57b38fe3b88eb5ed/bac...2.5 MiB
/image/scale/d2496a84d432be52c2ae37715d413ca80b3ea10f/bac...1.9 MiB
/image/scale/0a95f9d95f5696e06b862c2d3407d21896958d26/bac...1.4 MiB
/uploads/production/survin/script/23/survin.js625.1 KiB
www.softbank.jp/site/set/data/top/img/s/2026/img-initiatives-03.webp?20260410507.6 KiB
/image/scale/aa7df24c9cb4d25a41567d8be4c6510c37ff7170/bac...490.7 KiB
/image/scale/66f8c8b5a32f1b5ef664636f83b4f2d7a49c8c83/bac...410.0 KiB
/image/scale/d821277645f846ec2ceb9a8acadb7c6392738c04/bac...350.9 KiB
/image/scale/7976270a8f8652a74cb1c28d3dadb058762f2548/bac...343.2 KiB
/image/scale/805c93be8b8de3252ca52d6d0f4dc2592691fdaa/bac...311.8 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
SoftBank div.top-page-layout-mainvisual_inner > div.top-page-layout-mainvisual_logo > a.top-page-layout-mainvisual_logo-link > img.top-page-layout-mainvisual_logo-image
www.softbank.jp/site/set/data/top/img/shared/2026/logo-sb-black.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
●LCP breakdown
●Modern HTTP
●Optimize viewport for mobile
●Minify CSS
●User Timing marks and measures 5 user timings
●Avoid long main-thread tasks 20 long tasks found
●Avoid non-composited animations 2 animated elements found
●Network Requests
●Network Round Trip Times 170 ms
●Server Backend Latencies 250 ms
●Tasks
●Diagnostics
●Metrics
●Screenshot Thumbnails
●Final Screenshot
●Script Treemap Data
●Resources Summary
●Initial server response time was short Root document took 110 ms
○INP breakdown
○Avoid large layout shifts
82

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
モバイル div.top-page-menu-section > div.top-page-menu-icons-row > a.top-page-menu-item > span.top-page-menu-label
ワイモバイル div.top-page-menu-section > div.top-page-menu-icons-row > a.top-page-menu-item > span.top-page-menu-label
ラインモ div.top-page-menu-section > div.top-page-menu-icons-row > a.top-page-menu-item > span.top-page-menu-label
インターネット 固定電話 div.top-page-menu-section > div.top-page-menu-icons-row > a.top-page-menu-item > span.top-page-menu-label
でんき div.top-page-menu-section > div.top-page-menu-icons-row > a.top-page-menu-item > span.top-page-menu-label
法人のお客さま div.top-page-menu-section > div.top-page-menu-icons-row > a.top-page-menu-item > span.top-page-menu-label
企業・IR div.top-page-menu-section > div.top-page-menu-icons-row > a.top-page-menu-item > span.top-page-menu-label
ネットワーク div.top-page-menu-section > div.top-page-menu-icons-row > a.top-page-menu-item > span.top-page-menu-label
My SoftBank div.top-page-layout-service > div.top-page-menu-section > div.top-page-sub-menu > a.top-page-sub-btn
サポート div.top-page-layout-service > div.top-page-menu-section > div.top-page-sub-menu > a.top-page-sub-btn
店舗を探す div.top-page-layout-service > div.top-page-menu-section > div.top-page-sub-menu > a.top-page-sub-btn
オンラインショップ div.top-page-layout-service > div.top-page-menu-section > div.top-page-sub-menu > a.top-page-sub-btn
ENGLISH div.top-page-layout-service > div.top-page-menu-section > div.top-page-english-link > a
製品／料金のお知らせ section.top-page-section-01 > div.section-info-product-notice > aside.section-info-notices > header.section-info-notices_header
料金 li.section-info-notices_list-item > a.section-info-notices_link > div.section-info-notices_categories > span.section-info-notices_label
2026年4月10日 li.section-info-notices_list-item > a.section-info-notices_link > div.section-info-notices_categories > span.section-info-notices_date
ソフトバンクニュースを見る main.contents-area > section.top-page-section-01 > p.top-page-frontline-button-container > a.top-page-frontline-button
詳しくはこちら main.contents-area > section.top-page-section-01 > p.top-page-improvement-button-container > a.top-page-improvement-button
テクノロジー ul.top-page-list-news > li.top-page-list-news_item > a.top-page-link-news > span.top-page-link-news_label
製品・サービス・料金 ul.top-page-list-news > li.top-page-list-news_item > a.top-page-link-news > span.top-page-link-news_label
製品・サービス・料金 ul.top-page-list-news > li.top-page-list-news_item > a.top-page-link-news > span.top-page-link-news_label
製品・サービス・料金 ul.top-page-list-news > li.top-page-list-news_item > a.top-page-link-news > span.top-page-link-news_label
一覧を見る main.contents-area > section.top-page-section-01 > p.top-page-press-button-container > a.top-page-press-button

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
section.top-page-section-01 > div.top-page-layout-col2 > section.top-page-layout-col2_item > a.top-page-link-initiatives-all section.top-page-section-01 > div.top-page-layout-col2 > section.top-page-layout-col2_item > a.top-page-link-initiatives-all
section.top-page-section-01 > div.top-page-layout-col2 > section.top-page-layout-col2_item > a.top-page-link-initiatives-all section.top-page-section-01 > div.top-page-layout-col2 > section.top-page-layout-col2_item > a.top-page-link-initiatives-all
section.top-page-section-01 > div.top-page-layout-col2 > section.top-page-layout-col2_item > a.top-page-link-initiatives-all section.top-page-section-01 > div.top-page-layout-col2 > section.top-page-layout-col2_item > a.top-page-link-initiatives-all
section.top-page-section-01 > div.top-page-layout-col2 > section.top-page-layout-col2_item > a.top-page-link-initiatives-all section.top-page-section-01 > div.top-page-layout-col2 > section.top-page-layout-col2_item > a.top-page-link-initiatives-all

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

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

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
スライド 1 div.top-page-carousel-01 > div.top-page-carousel-01-pagination > div.top-page-carousel-01-pagination_dots > button.top-page-carousel-01-pagination_dot
スライド 2 div.top-page-carousel-01 > div.top-page-carousel-01-pagination > div.top-page-carousel-01-pagination_dots > button.top-page-carousel-01-pagination_dot
スライド 3 div.top-page-carousel-01 > div.top-page-carousel-01-pagination > div.top-page-carousel-01-pagination_dots > button.top-page-carousel-01-pagination_dot
スライド 4 div.top-page-carousel-01 > div.top-page-carousel-01-pagination > div.top-page-carousel-01-pagination_dots > button.top-page-carousel-01-pagination_dot
スライド 5 div.top-page-carousel-01 > div.top-page-carousel-01-pagination > div.top-page-carousel-01-pagination_dots > button.top-page-carousel-01-pagination_dot
スライド 6 div.top-page-carousel-01 > div.top-page-carousel-01-pagination > div.top-page-carousel-01-pagination_dots > button.top-page-carousel-01-pagination_dot

These items highlight common accessibility best practices.

○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
●Buttons have an accessible name
●Image elements have `[alt]` attributes
●ARIA attributes are used as specified for the element's role
●`[aria-hidden="true"]` elements do not contain focusable descendents
●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
●Heading elements appear in a sequentially-descending order
●Document has a main landmark.
●Deprecated ARIA roles were not used
●Image elements do not have `[alt]` attributes that are redundant text.
○`[accesskey]` values are unique
○`button`, `link`, and `menuitem` elements have accessible names
○Elements with `role="dialog"` or `role="alertdialog"` have accessible names.
○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
○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.
○No element has a `[tabindex]` value greater than 0
○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
○Identical links have the same purpose.
○Elements with visible text labels have matching accessible names.
○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
Unload event listeners are deprecated and will be removed.
www.softbank.jp/site/set/data/top/js/s/2026/index.js line 15, col 23032

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.softbank.jp/
Access to fetch at 'https://ap03.records.in.treasuredata.com/d0_tdtag/d_rawdata_all_1?modified=1776817068120' from origin 'https://www.softbank.jp' has been blocked by CORS policy: Response to preflight request doesn't pass access control check: No 'Access-Control-Allow-Origin' header is present on the requested resource.
ap03.records.in.treasuredata.com/d0_tdtag/d_rawdata_all_1?modified=1776817068120
Failed to load resource: net::ERR_FAILED
●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 clickjacking with XFO or CSP
●Mitigate DOM-based XSS with Trusted Types
●Detected JavaScript libraries
●Page has valid source maps
○Redirects HTTP traffic to HTTPS
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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