Catalog / koyo1973.co.jp
61

SEO audit for koyo1973.co.jp

光洋産業株式会社 | Shaping the Future

other

Health 61/100 (fair) · 14 pages crawled · generated 2026-08-26

Download Markdown report (feed to ChatGPT / Claude / Cursor)

Shaping the Future

Screenshot of koyo1973.co.jp
14
pages crawled
14
indexable pages
1
errors
69
warnings
146
notices
2
orphan pages
0
broken links
Category breakdown
CategoryScoreErrorsWarningsNotices
Security 93 1 0 14
Agent Readiness 70 0 14 6
Content 70 0 14 9
Images 70 0 14 1
Performance 70 0 14 56
Headings 87 0 6 0
Canonical 89 0 5 0
Links 96 0 2 4
Duplicate 100 0 0 6
Meta Description 100 0 0 7
Sitemap 100 0 0 1
Social 100 0 0 28
Structured Data 100 0 0 7
Titles 100 0 0 5
URL 100 0 0 2
Findings

Errors (1 rules)

error Mixed content on HTTPS page

Rule security.mixed_content · Security · 1 occurrence(s)

Warnings (7 rules)

warning Control has no accessible name

Rule agent.control_no_name · Agent Readiness · 14 occurrence(s)

warning Missing canonical tag

Rule canonical.missing · Canonical · 5 occurrence(s)

warning Thin content (low word count)

Rule content.thin · Content · 14 occurrence(s)

warning Missing <h1>

Rule h1.missing · Headings · 6 occurrence(s)

warning Images missing alt text

Rule images.missing_alt · Images · 14 occurrence(s)

warning Orphan page (no internal inlinks)

Rule links.orphan · Links · 2 occurrence(s)

warning Render-blocking script in <head> (no defer/async)

Rule perf.render_blocking · Performance · 14 occurrence(s)

Notices (19 rules)

notice No llms.txt for AI agents

Rule agent.llms_txt_missing · Agent Readiness · 1 occurrence(s)

  • https://koyo1973.co.jp/ — no llms.txt found at the site root — add one so AI agents get a curated site summary

notice No main landmark for AI agents

Rule agent.no_main_landmark · Agent Readiness · 5 occurrence(s)

notice Low text-to-HTML ratio

Rule content.low_ratio · Content · 9 occurrence(s)

notice Duplicate meta description across pages

Rule duplicate.meta_desc · Duplicate · 6 occurrence(s)

notice Likely hero image lacks fetchpriority=high

Rule images.hero_no_fetchpriority · Performance · 14 occurrence(s)

  • https://koyo1973.co.jp/ — the likely hero/LCP image (logo-header-color.png) has no fetchpriority="high" — adding it tells the browser to fetch the hero earlier in the waterfall, reducing Largest Contentful Paint. This is a low-severity nudge; verify the flagged image is actually your LCP element.
  • https://koyo1973.co.jp/author/koyo-sawarame/ — the likely hero/LCP image (logo-header-color.png) has no fetchpriority="high" — adding it tells the browser to fetch the hero earlier in the waterfall, reducing Largest Contentful Paint. This is a low-severity nudge; verify the flagged image is actually your LCP element.
  • https://koyo1973.co.jp/blog/ — the likely hero/LCP image (logo-header-color.png) has no fetchpriority="high" — adding it tells the browser to fetch the hero earlier in the waterfall, reducing Largest Contentful Paint. This is a low-severity nudge; verify the flagged image is actually your LCP element.
  • https://koyo1973.co.jp/company/ — the likely hero/LCP image (logo-header-color.png) has no fetchpriority="high" — adding it tells the browser to fetch the hero earlier in the waterfall, reducing Largest Contentful Paint. This is a low-severity nudge; verify the flagged image is actually your LCP element.
  • https://koyo1973.co.jp/contact/ — the likely hero/LCP image (logo-header-color.png) has no fetchpriority="high" — adding it tells the browser to fetch the hero earlier in the waterfall, reducing Largest Contentful Paint. This is a low-severity nudge; verify the flagged image is actually your LCP element.
  • https://koyo1973.co.jp/message/ — the likely hero/LCP image (logo-header-color.png) has no fetchpriority="high" — adding it tells the browser to fetch the hero earlier in the waterfall, reducing Largest Contentful Paint. This is a low-severity nudge; verify the flagged image is actually your LCP element.
  • https://koyo1973.co.jp/products/ — the likely hero/LCP image (logo-header-color.png) has no fetchpriority="high" — adding it tells the browser to fetch the hero earlier in the waterfall, reducing Largest Contentful Paint. This is a low-severity nudge; verify the flagged image is actually your LCP element.
  • https://koyo1973.co.jp/products/environmental-initiatives/ — the likely hero/LCP image (logo-header-color.png) has no fetchpriority="high" — adding it tells the browser to fetch the hero earlier in the waterfall, reducing Largest Contentful Paint. This is a low-severity nudge; verify the flagged image is actually your LCP element.
  • https://koyo1973.co.jp/products/examples-of-use/ — the likely hero/LCP image (logo-header-color.png) has no fetchpriority="high" — adding it tells the browser to fetch the hero earlier in the waterfall, reducing Largest Contentful Paint. This is a low-severity nudge; verify the flagged image is actually your LCP element.
  • https://koyo1973.co.jp/products/innovation-and-market-adaptation/ — the likely hero/LCP image (logo-header-color.png) has no fetchpriority="high" — adding it tells the browser to fetch the hero earlier in the waterfall, reducing Largest Contentful Paint. This is a low-severity nudge; verify the flagged image is actually your LCP element.
  • https://koyo1973.co.jp/products/specifications-and-ingredient-information/ — the likely hero/LCP image (logo-header-color.png) has no fetchpriority="high" — adding it tells the browser to fetch the hero earlier in the waterfall, reducing Largest Contentful Paint. This is a low-severity nudge; verify the flagged image is actually your LCP element.
  • https://koyo1973.co.jp/products_category/manufacturing-process/ — the likely hero/LCP image (logo-header-color.png) has no fetchpriority="high" — adding it tells the browser to fetch the hero earlier in the waterfall, reducing Largest Contentful Paint. This is a low-severity nudge; verify the flagged image is actually your LCP element.
  • https://koyo1973.co.jp/products_category/product/ — the likely hero/LCP image (logo-header-color.png) has no fetchpriority="high" — adding it tells the browser to fetch the hero earlier in the waterfall, reducing Largest Contentful Paint. This is a low-severity nudge; verify the flagged image is actually your LCP element.
  • https://koyo1973.co.jp/recruit/ — the likely hero/LCP image (logo-header-color.png) has no fetchpriority="high" — adding it tells the browser to fetch the hero earlier in the waterfall, reducing Largest Contentful Paint. This is a low-severity nudge; verify the flagged image is actually your LCP element.

notice Images without width/height (layout shift / CLS)

Rule images.missing_dimensions · Images · 1 occurrence(s)

notice Page has only one internal inlink (fragile crawl path)

Rule links.single_inlink · Links · 4 occurrence(s)

notice Meta description too short

Rule meta_desc.too_short · Meta Description · 7 occurrence(s)

notice Missing Open Graph tags

Rule og.missing · Social · 14 occurrence(s)

notice Legacy image format (jpg/png/gif) with no next-gen fallback

Rule perf.images_legacy_format · Performance · 14 occurrence(s)

  • https://koyo1973.co.jp/ — 3 image(s) use a legacy format (jpg/png/gif) with no next-gen <picture> fallback. Serve WebP or AVIF (with a <picture> typed <source>) to cut image transfer weight and improve LCP.
  • https://koyo1973.co.jp/author/koyo-sawarame/ — 2 image(s) use a legacy format (jpg/png/gif) with no next-gen <picture> fallback. Serve WebP or AVIF (with a <picture> typed <source>) to cut image transfer weight and improve LCP.
  • https://koyo1973.co.jp/blog/ — 2 image(s) use a legacy format (jpg/png/gif) with no next-gen <picture> fallback. Serve WebP or AVIF (with a <picture> typed <source>) to cut image transfer weight and improve LCP.
  • https://koyo1973.co.jp/company/ — 2 image(s) use a legacy format (jpg/png/gif) with no next-gen <picture> fallback. Serve WebP or AVIF (with a <picture> typed <source>) to cut image transfer weight and improve LCP.
  • https://koyo1973.co.jp/contact/ — 2 image(s) use a legacy format (jpg/png/gif) with no next-gen <picture> fallback. Serve WebP or AVIF (with a <picture> typed <source>) to cut image transfer weight and improve LCP.
  • https://koyo1973.co.jp/message/ — 2 image(s) use a legacy format (jpg/png/gif) with no next-gen <picture> fallback. Serve WebP or AVIF (with a <picture> typed <source>) to cut image transfer weight and improve LCP.
  • https://koyo1973.co.jp/products/ — 2 image(s) use a legacy format (jpg/png/gif) with no next-gen <picture> fallback. Serve WebP or AVIF (with a <picture> typed <source>) to cut image transfer weight and improve LCP.
  • https://koyo1973.co.jp/products/environmental-initiatives/ — 3 image(s) use a legacy format (jpg/png/gif) with no next-gen <picture> fallback. Serve WebP or AVIF (with a <picture> typed <source>) to cut image transfer weight and improve LCP.
  • https://koyo1973.co.jp/products/examples-of-use/ — 3 image(s) use a legacy format (jpg/png/gif) with no next-gen <picture> fallback. Serve WebP or AVIF (with a <picture> typed <source>) to cut image transfer weight and improve LCP.
  • https://koyo1973.co.jp/products/innovation-and-market-adaptation/ — 3 image(s) use a legacy format (jpg/png/gif) with no next-gen <picture> fallback. Serve WebP or AVIF (with a <picture> typed <source>) to cut image transfer weight and improve LCP.
  • https://koyo1973.co.jp/products/specifications-and-ingredient-information/ — 3 image(s) use a legacy format (jpg/png/gif) with no next-gen <picture> fallback. Serve WebP or AVIF (with a <picture> typed <source>) to cut image transfer weight and improve LCP.
  • https://koyo1973.co.jp/products_category/manufacturing-process/ — 2 image(s) use a legacy format (jpg/png/gif) with no next-gen <picture> fallback. Serve WebP or AVIF (with a <picture> typed <source>) to cut image transfer weight and improve LCP.
  • https://koyo1973.co.jp/products_category/product/ — 2 image(s) use a legacy format (jpg/png/gif) with no next-gen <picture> fallback. Serve WebP or AVIF (with a <picture> typed <source>) to cut image transfer weight and improve LCP.
  • https://koyo1973.co.jp/recruit/ — 2 image(s) use a legacy format (jpg/png/gif) with no next-gen <picture> fallback. Serve WebP or AVIF (with a <picture> typed <source>) to cut image transfer weight and improve LCP.

notice No ETag header (no conditional GET for unchanged pages)

Rule perf.no_etag · Performance · 14 occurrence(s)

  • https://koyo1973.co.jp/ — the response carries no ETag header — without an ETag (or Last-Modified) there is no cache-revalidation mechanism, so crawlers re-download the full body every visit. Emit an ETag (a content hash) to enable conditional If-None-Match requests.
  • https://koyo1973.co.jp/author/koyo-sawarame/ — the response carries no ETag header — without an ETag (or Last-Modified) there is no cache-revalidation mechanism, so crawlers re-download the full body every visit. Emit an ETag (a content hash) to enable conditional If-None-Match requests.
  • https://koyo1973.co.jp/blog/ — the response carries no ETag header — without an ETag (or Last-Modified) there is no cache-revalidation mechanism, so crawlers re-download the full body every visit. Emit an ETag (a content hash) to enable conditional If-None-Match requests.
  • https://koyo1973.co.jp/company/ — the response carries no ETag header — without an ETag (or Last-Modified) there is no cache-revalidation mechanism, so crawlers re-download the full body every visit. Emit an ETag (a content hash) to enable conditional If-None-Match requests.
  • https://koyo1973.co.jp/contact/ — the response carries no ETag header — without an ETag (or Last-Modified) there is no cache-revalidation mechanism, so crawlers re-download the full body every visit. Emit an ETag (a content hash) to enable conditional If-None-Match requests.
  • https://koyo1973.co.jp/message/ — the response carries no ETag header — without an ETag (or Last-Modified) there is no cache-revalidation mechanism, so crawlers re-download the full body every visit. Emit an ETag (a content hash) to enable conditional If-None-Match requests.
  • https://koyo1973.co.jp/products/ — the response carries no ETag header — without an ETag (or Last-Modified) there is no cache-revalidation mechanism, so crawlers re-download the full body every visit. Emit an ETag (a content hash) to enable conditional If-None-Match requests.
  • https://koyo1973.co.jp/products/environmental-initiatives/ — the response carries no ETag header — without an ETag (or Last-Modified) there is no cache-revalidation mechanism, so crawlers re-download the full body every visit. Emit an ETag (a content hash) to enable conditional If-None-Match requests.
  • https://koyo1973.co.jp/products/examples-of-use/ — the response carries no ETag header — without an ETag (or Last-Modified) there is no cache-revalidation mechanism, so crawlers re-download the full body every visit. Emit an ETag (a content hash) to enable conditional If-None-Match requests.
  • https://koyo1973.co.jp/products/innovation-and-market-adaptation/ — the response carries no ETag header — without an ETag (or Last-Modified) there is no cache-revalidation mechanism, so crawlers re-download the full body every visit. Emit an ETag (a content hash) to enable conditional If-None-Match requests.
  • https://koyo1973.co.jp/products/specifications-and-ingredient-information/ — the response carries no ETag header — without an ETag (or Last-Modified) there is no cache-revalidation mechanism, so crawlers re-download the full body every visit. Emit an ETag (a content hash) to enable conditional If-None-Match requests.
  • https://koyo1973.co.jp/products_category/manufacturing-process/ — the response carries no ETag header — without an ETag (or Last-Modified) there is no cache-revalidation mechanism, so crawlers re-download the full body every visit. Emit an ETag (a content hash) to enable conditional If-None-Match requests.
  • https://koyo1973.co.jp/products_category/product/ — the response carries no ETag header — without an ETag (or Last-Modified) there is no cache-revalidation mechanism, so crawlers re-download the full body every visit. Emit an ETag (a content hash) to enable conditional If-None-Match requests.
  • https://koyo1973.co.jp/recruit/ — the response carries no ETag header — without an ETag (or Last-Modified) there is no cache-revalidation mechanism, so crawlers re-download the full body every visit. Emit an ETag (a content hash) to enable conditional If-None-Match requests.

notice No Last-Modified header (no conditional GET for unchanged pages)

Rule perf.no_last_modified · Performance · 14 occurrence(s)

  • https://koyo1973.co.jp/ — the response carries no Last-Modified header — Googlebot can't send an If-Modified-Since request, so it re-downloads the full page body on every crawl even when nothing changed. Emit Last-Modified (or an ETag) on stable pages to enable 304 Not Modified responses.
  • https://koyo1973.co.jp/author/koyo-sawarame/ — the response carries no Last-Modified header — Googlebot can't send an If-Modified-Since request, so it re-downloads the full page body on every crawl even when nothing changed. Emit Last-Modified (or an ETag) on stable pages to enable 304 Not Modified responses.
  • https://koyo1973.co.jp/blog/ — the response carries no Last-Modified header — Googlebot can't send an If-Modified-Since request, so it re-downloads the full page body on every crawl even when nothing changed. Emit Last-Modified (or an ETag) on stable pages to enable 304 Not Modified responses.
  • https://koyo1973.co.jp/company/ — the response carries no Last-Modified header — Googlebot can't send an If-Modified-Since request, so it re-downloads the full page body on every crawl even when nothing changed. Emit Last-Modified (or an ETag) on stable pages to enable 304 Not Modified responses.
  • https://koyo1973.co.jp/contact/ — the response carries no Last-Modified header — Googlebot can't send an If-Modified-Since request, so it re-downloads the full page body on every crawl even when nothing changed. Emit Last-Modified (or an ETag) on stable pages to enable 304 Not Modified responses.
  • https://koyo1973.co.jp/message/ — the response carries no Last-Modified header — Googlebot can't send an If-Modified-Since request, so it re-downloads the full page body on every crawl even when nothing changed. Emit Last-Modified (or an ETag) on stable pages to enable 304 Not Modified responses.
  • https://koyo1973.co.jp/products/ — the response carries no Last-Modified header — Googlebot can't send an If-Modified-Since request, so it re-downloads the full page body on every crawl even when nothing changed. Emit Last-Modified (or an ETag) on stable pages to enable 304 Not Modified responses.
  • https://koyo1973.co.jp/products/environmental-initiatives/ — the response carries no Last-Modified header — Googlebot can't send an If-Modified-Since request, so it re-downloads the full page body on every crawl even when nothing changed. Emit Last-Modified (or an ETag) on stable pages to enable 304 Not Modified responses.
  • https://koyo1973.co.jp/products/examples-of-use/ — the response carries no Last-Modified header — Googlebot can't send an If-Modified-Since request, so it re-downloads the full page body on every crawl even when nothing changed. Emit Last-Modified (or an ETag) on stable pages to enable 304 Not Modified responses.
  • https://koyo1973.co.jp/products/innovation-and-market-adaptation/ — the response carries no Last-Modified header — Googlebot can't send an If-Modified-Since request, so it re-downloads the full page body on every crawl even when nothing changed. Emit Last-Modified (or an ETag) on stable pages to enable 304 Not Modified responses.
  • https://koyo1973.co.jp/products/specifications-and-ingredient-information/ — the response carries no Last-Modified header — Googlebot can't send an If-Modified-Since request, so it re-downloads the full page body on every crawl even when nothing changed. Emit Last-Modified (or an ETag) on stable pages to enable 304 Not Modified responses.
  • https://koyo1973.co.jp/products_category/manufacturing-process/ — the response carries no Last-Modified header — Googlebot can't send an If-Modified-Since request, so it re-downloads the full page body on every crawl even when nothing changed. Emit Last-Modified (or an ETag) on stable pages to enable 304 Not Modified responses.
  • https://koyo1973.co.jp/products_category/product/ — the response carries no Last-Modified header — Googlebot can't send an If-Modified-Since request, so it re-downloads the full page body on every crawl even when nothing changed. Emit Last-Modified (or an ETag) on stable pages to enable 304 Not Modified responses.
  • https://koyo1973.co.jp/recruit/ — the response carries no Last-Modified header — Googlebot can't send an If-Modified-Since request, so it re-downloads the full page body on every crawl even when nothing changed. Emit Last-Modified (or an ETag) on stable pages to enable 304 Not Modified responses.

notice Deep page has no BreadcrumbList structured data

Rule schema.breadcrumb_missing · Structured Data · 1 occurrence(s)

notice No structured data detected

Rule schema.none · Structured Data · 6 occurrence(s)

notice Missing recommended security headers

Rule security.missing_headers · Security · 14 occurrence(s)

notice Indexable page not listed in sitemap

Rule sitemap.orphan_not_listed · Sitemap · 1 occurrence(s)

notice Title is very short

Rule title.too_short · Titles · 5 occurrence(s)

notice Missing Twitter Card tag

Rule twitter.missing · Social · 14 occurrence(s)

notice Underscores in URL path (prefer hyphens)

Rule url.underscores · URL · 2 occurrence(s)

Pages (showing 14 of 14)
URLStatusIndexableWordsIn-links
https://koyo1973.co.jp/
光洋産業株式会社 | Shaping the Future		 200 yes 49 14
https://koyo1973.co.jp/company/
会社情報 | 光洋産業株式会社		 200 yes 54 14
https://koyo1973.co.jp/contact/
お問い合わせ | 光洋産業株式会社		 200 yes 41 14
https://koyo1973.co.jp/message/
社長挨拶 | 光洋産業株式会社		 200 yes 36 14
https://koyo1973.co.jp/products_category/manufacturing-process/
製造工程に関する記事一覧		 200 yes 57 14
https://koyo1973.co.jp/products_category/product/
製品情報に関する記事一覧		 200 yes 54 14
https://koyo1973.co.jp/recruit/
採用情報 | 光洋産業株式会社		 200 yes 100 14
https://koyo1973.co.jp/products/
商品 | 光洋産業株式会社		 200 yes 47 6
https://koyo1973.co.jp/products/environmental-initiatives/
環境への取り組み | 光洋産業株式会社		 200 yes 38 1
https://koyo1973.co.jp/products/examples-of-use/
使用例 | 光洋産業株式会社		 200 yes 39 1
https://koyo1973.co.jp/products/innovation-and-market-adaptation/
イノベーションと市場への適応 | 光洋産業株式会社		 200 yes 38 1
https://koyo1973.co.jp/products/specifications-and-ingredient-information/
仕様・成分情報 | 光洋産業株式会社		 200 yes 63 1
https://koyo1973.co.jp/author/koyo-sawarame/
koyo-sawarameのブログ一覧 | 光洋産業株式会社		 200 yes 32 0
https://koyo1973.co.jp/blog/
ブログ | 光洋産業株式会社		 200 yes 35 0

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