Lighthouse Desktop
· 0 checks — Desktop Lighthouse audit -- Performance, Accessibility, Best Practices, and SEO category breakdown.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.
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
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.
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.
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.
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.
Performance issues directly impact user engagement and conversion rates.
Each subpart has specific improvement strategies. Ideally, most of the LCP time should be spent on loading the resources, not within delays.
Performance issues directly impact user engagement and conversion rates.
Optimize LCP by making the LCP image discoverable from the HTML immediately, and avoiding lazy-loading
Performance issues directly impact user engagement and conversion rates.
HTTP/2 and HTTP/3 offer many benefits over HTTP/1.1, such as multiplexing. Learn more about using modern HTTP.
Performance issues directly impact user engagement and conversion rates.
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.
Performance issues directly impact user engagement and conversion rates.
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.
Performance issues directly impact user engagement and conversion rates.
| URL | Transfer Size | Duration |
|---|---|---|
| rs.sakura.ad.jp/assets/scripts/information.js | 1.8 KiB | 966 ms |
| rs.sakura.ad.jp/assets/styles/home.css | 4.1 KiB | 966 ms |
| rs.sakura.ad.jp/resource/assets/styles/style.css | 4.0 KiB | 342 ms |
| rs.sakura.ad.jp/assets/styles/style.css | 11.6 KiB | 966 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.
Performance issues directly impact user engagement and conversion rates.
| URL | Time Spent |
|---|---|
| www.sakura.ne.jp/ | 964 ms |
| rs.sakura.ad.jp/ | 0.0 ms |
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.
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.
Performance issues directly impact user engagement and conversion rates.
| URL | Transfer Size | Est Savings |
|---|---|---|
| www.googletagmanager.com/gtag/js?id=G-1JCLR3N1HE&cx=c>m=4e64h1 | 176.3 KiB | 70.4 KiB |
| www.googletagmanager.com/gtag/js?id=G-RY0M78YRM0&cx=c>m=4e64h1 | 172.4 KiB | 67.8 KiB |
| www.googletagmanager.com/gtag/js?id=G-M3MLBH78ML&cx=c>m=4e64h1 | 178.0 KiB | 67.1 KiB |
| www.googletagmanager.com/gtag/js?id=G-7VHJVBXPZ3&cx=c>m=4e64h1 | 159.7 KiB | 65.4 KiB |
| www.googletagmanager.com/gtag/js?id=AW-985956116&cx=c>m=4e64h1 | 145.7 KiB | 62.3 KiB |
| www.googletagmanager.com/gtag/js?id=AW-17304125414&cx=c>m=4e64h1 | 143.6 KiB | 61.6 KiB |
| www.googletagmanager.com/gtm.js?id=GTM-NL8DR22 | 188.1 KiB | 52.0 KiB |
| connect.facebook.net/en_US/fbevents.js | 96.5 KiB | 34.5 KiB |
Minifying CSS files can reduce network payload sizes. Learn how to minify CSS.
Performance issues directly impact user engagement and conversion rates.
| URL | Transfer Size | Est Savings |
|---|---|---|
| rs.sakura.ad.jp/assets/styles/style.css | 11.6 KiB | 4.0 KiB |
Large network payloads cost users real money and are highly correlated with long load times. Learn how to reduce payload sizes.
Performance issues directly impact user engagement and conversion rates.
Set an explicit width and height on image elements to reduce layout shifts and improve CLS. Learn how to set image dimensions
Performance issues directly impact user engagement and conversion rates.
| URL | |
|---|---|
li#splide04-slide01 > a.c-card-link > figure.link-figure > img li#splide04-slide01 > a.c-card-link > figure.link-figure > img | /column/wp-content/uploads/2025/10/Gmailに届かない... |
li#splide04-slide02 > a.c-card-link > figure.link-figure > img li#splide04-slide02 > a.c-card-link > figure.link-figure > img | /column/wp-content/uploads/2025/09/ドメイン名の解... |
li#splide04-slide03 > a.c-card-link > figure.link-figure > img li#splide04-slide03 > a.c-card-link > figure.link-figure > img | /column/wp-content/uploads/2025/08/巧妙化し増え続... |
【ビジネスメールプラン登場】IPアドレス専有でメール到達率向上！ div#gtm-popup-plan_mail_202604_popup > div.popup-content > a.popup-link > img.popup-img-pc | /public/cta/54089/16679d91-28f8-4e6b-880b-0ed745aca0f9.png |
div.hero-head > div.l-inner > figure.hero-figure > img div.hero-head > div.l-inner > figure.hero-figure > img | rs.sakura.ad.jp/assets/images/home/illust-hero.svg |
div.c-box-link > figure.link-figure > picture > img div.c-box-link > figure.link-figure > picture > img | rs.sakura.ad.jp/assets/images/common/img-startup.avif |
div.l-inner > div.c-box-link > figure.link-figure > img div.l-inner > div.c-box-link > figure.link-figure > img | rs.sakura.ad.jp/assets/images/common/img-transfer.svg |
div.c-box-link > figure.link-figure > picture > img div.c-box-link > figure.link-figure > picture > img | rs.sakura.ad.jp/assets/images/common/img-document.avif |
div.about-item > figure.about-figure > picture > img div.about-item > figure.about-figure > picture > img | rs.sakura.ad.jp/assets/images/home/img-about-01.avif |
div.about-item > figure.about-figure > picture > img div.about-item > figure.about-figure > picture > img | rs.sakura.ad.jp/assets/images/home/img-about-02.avif |
div.about-item > figure.about-figure > picture > img div.about-item > figure.about-figure > picture > img | rs.sakura.ad.jp/assets/images/home/img-about-03.avif |
div.about-item > figure.about-figure > picture > img div.about-item > figure.about-figure > picture > img | rs.sakura.ad.jp/assets/images/home/img-about-04.avif |
a.c-card-link > figure.link-figure > picture > img a.c-card-link > figure.link-figure > picture > img | rs.sakura.ad.jp/assets/images/home/event-seminar/thumb-203.webp |
a.c-card-link > figure.link-figure > picture > img a.c-card-link > figure.link-figure > picture > img | rs.sakura.ad.jp/assets/images/home/event-seminar/thumb-204.webp |
a.c-card-link > figure.link-figure > picture > img a.c-card-link > figure.link-figure > picture > img | rs.sakura.ad.jp/assets/images/home/img-hero-support.avif |
a.c-card-link > figure.link-figure > picture > img a.c-card-link > figure.link-figure > picture > img | rs.sakura.ad.jp/assets/images/home/img-hero-plan.avif |
a.c-card-link > figure.link-figure > picture > img a.c-card-link > figure.link-figure > picture > img | rs.sakura.ad.jp/assets/images/home/img-hero-agency.avif |
さくらのレンタルサーバ div.header-inner > div.header-pannel > a.header-logo > img | rs.sakura.ad.jp/assets/images/common/logo.svg |
さくらのレンタルサーバ div.footer-service-head > div.footer-service-logo > a > img | rs.sakura.ad.jp/assets/images/common/logo.svg |
ul.flow-list > li > figure.flow-figure > img ul.flow-list > li > figure.flow-figure > img | rs.sakura.ad.jp/assets/images/home/icon-plan.svg |
ul.flow-list > li > figure.flow-figure > img ul.flow-list > li > figure.flow-figure > img | rs.sakura.ad.jp/assets/images/home/icon-add.svg |
ul.flow-list > li > figure.flow-figure > img ul.flow-list > li > figure.flow-figure > img | rs.sakura.ad.jp/assets/images/home/icon-card.svg |
ul.flow-list > li > figure.flow-figure > img ul.flow-list > li > figure.flow-figure > img | rs.sakura.ad.jp/assets/images/home/icon-start.svg |
X @sakura_server ul.footer-service-sns > li > a > img.icon-x | rs.sakura.ad.jp/assets/images/common/icons/icon-x.svg |
Youtube ul.footer-service-sns > li > a > img.icon-youtube | rs.sakura.ad.jp/assets/images/common/icons/icon-youtube.svg |
プライバシーマーク ul.globalfooter-mark-list > li.globalfooter-mark-item > a.globalfooter-mark-link > img.p-mark | |
PCI DSS監査証明マーク figure.globalfooter-mark > ul.globalfooter-mark-list > li.globalfooter-mark-item > img.pci-dss | |
ISO27001認証マーク ul.globalfooter-mark-list > li.globalfooter-mark-item > a.globalfooter-mark-link > img.iso-mark |
More information about the performance of your application. These numbers don't directly affect the Performance score.
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
Assistive technologies, like screen readers, can't interpret ARIA attributes with invalid values. Learn more about valid values for ARIA attributes.
Performance issues directly impact user engagement and conversion rates.
| Failing Elements |
|---|
サポート nav#rs-globalnav > ul.rs-globalnav-menu > li > button.rs-globalnav-toggle-button |
Using ARIA attributes in roles where they are prohibited can mean that important information is not communicated to users of assistive technologies. Learn more about prohibited ARIA roles.
Performance issues directly impact user engagement and conversion rates.
| Failing Elements |
|---|
利用できます div.plan-spec > dl > dd > span.c-icon-circle |
利用できません div.plan-spec > dl > dd > span.c-icon-dash |
利用できません div.plan-spec > dl > dd > span.c-icon-dash |
利用できます div.plan-spec > dl > dd > span.c-icon-circle |
利用できません div.plan-spec > dl > dd > span.c-icon-dash |
利用できます div.plan-spec > dl > dd > span.c-icon-circle |
利用できます div.plan-spec > dl > dd > span.c-icon-circle |
利用できます div.plan-spec > dl > dd > span.c-icon-circle |
利用できます div.plan-spec > dl > dd > span.c-icon-circle |
利用できません div.plan-spec > dl > dd > span.c-icon-dash |
利用できます div.plan-spec > dl > dd > span.c-icon-circle |
利用できます div.plan-spec > dl > dd > span.c-icon-circle |
利用できます div.plan-spec > dl > dd > span.c-icon-circle |
利用できます div.plan-spec > dl > dd > span.c-icon-circle |
利用できます div.plan-spec > dl > dd > span.c-icon-circle |
利用できます div.plan-spec > dl > dd > span.c-icon-circle |
利用できます div.plan-spec > dl > dd > span.c-icon-circle |
利用できます div.plan-spec > dl > dd > span.c-icon-circle |
利用できません div.plan-spec > dl > dd > span.c-icon-dash |
利用できます div.plan-spec > dl > dd > span.c-icon-circle |
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.
Performance issues directly impact user engagement and conversion rates.
| Failing Elements |
|---|
WordPress div#splide02-slide01 > div.plan-spec > dl > dt |
バックアップ＆
ステージング div#splide02-slide01 > div.plan-spec > dl > dt |
複数人での管理 div#splide02-slide01 > div.plan-spec > dl > dt |
おすすめ div#splide02-track > div#splide02-list > div#splide02-slide02 > span.label |
複数人での管理 div#splide02-slide02 > div.plan-spec > dl > dt |
上位プラン変更 div#splide02-slide04 > div.plan-spec > dl > dt |
01 ul.flow-list > li > figure.flow-figure > span |
02 ul.flow-list > li > figure.flow-figure > span |
03 ul.flow-list > li > figure.flow-figure > span |
04 ul.flow-list > li > figure.flow-figure > span |
オンライン a.c-card-link > div.link-text > div.event-seminar-tags > span.event-seminar-tag |
オンライン a.c-card-link > div.link-text > div.event-seminar-tags > span.event-seminar-tag |
2026/04/08 li.information-item > a.c-button > div.information-meta > time.information-date |
お知らせ li.information-item > a.c-button > div.information-meta > span.information-category |
2026/04/08 li.information-item > a.c-button > div.information-meta > time.information-date |
お知らせ li.information-item > a.c-button > div.information-meta > span.information-category |
2026/04/08 li.information-item > a.c-button > div.information-meta > time.information-date |
2026/03/31 li.information-item > a.c-button > div.information-meta > time.information-date |
お知らせ li.information-item > a.c-button > div.information-meta > span.information-category |
2026/03/31 li.information-item > a.c-button > div.information-meta > time.information-date |
お知らせ li.information-item > a.c-button > div.information-meta > span.information-category |
2026/02/26 li.information-item > a.c-button > div.information-meta > time.information-date |
お知らせ li.information-item > a.c-button > div.information-meta > span.information-category |
These are opportunities to improve the legibility of your content.
Best Practices
General
Deprecated APIs will eventually be removed from the browser. Learn more about deprecated APIs.
Performance issues directly impact user engagement and conversion rates.
| Deprecation / Warning | Source |
|---|---|
| AttributionReporting | connect.facebook.net/en_US/fbevents.js line 279, col 769 |
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
Performance issues directly impact user engagement and conversion rates.
| Source | Description |
|---|---|
Access to fetch at 'https://apm.yahoo.co.jp/rt/?p=POM1Y9HH68&label=&ref=https%3A%2F%2Frs.sakura.ad.jp%2F&rref=&pt=&item=&cat=&price=&quantity=&et_optout=false&r=1776799451.698474&pvid=hgng8ckzwtbmo90imjs&__lt__cid_valid=false&_impl=ytag&brands=%22Chromium%22%3B%20v%3D%22147.0.7727.101%22%2C%20%22Not.A%2FBrand%22%3B%20v%3D%228.0.0.0%22&platform=%22macOS%22&platform_version=%2210.15.7%22' from origin 'https://rs.sakura.ad.jp' has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present on the requested resource. | |
Failed to load resource: net::ERR_FAILED |
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.