Rapport SEO : naisuku.jp
Généré le 1 mai 2026 · 46 constatations · 8.5s
Les sites institutionnels privilégient l'accessibilité, la sécurité et une indexation rigoureuse pour permettre aux citoyens et usagers d'accéder facilement à l'information.
Détail des scores
Score moyen Général : 50
Projection du score
Amélioration estimée sur la base des constatations identifiées dans ce rapport
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Détail par module
Toutes les constatations (43)
Critique (5)
- highheaders
Missing strict-transport-security
HSTS header is missing. The site may be vulnerable to downgrade attacks.
Add Strict-Transport-Security header with max-age of at least 31536000
- highsitemap
Missing sitemap.xml
No sitemap.xml found at the root
Create a sitemap.xml to help search engines discover all pages
- highcontent
Images missing alt text
3 image(s) have no alt attribute
Add descriptive alt text to all images for accessibility and SEO
- highaccessibility
3 images missing alt attribute
Images without alt text are inaccessible to screen readers
Add descriptive alt text to all informational images, or alt="" for decorative ones
- highsocial checker
Missing og:title
Open Graph title is not set — social shares will use generic text
Add og:title meta tag for compelling social media previews
Moyen (22)
- mediumdns
No DKIM record found
None of the common DKIM selectors returned a valid key. Email authentication may be incomplete.
Configure DKIM signing with your email provider and publish the public key in DNS
- mediumheaders
Missing content-security-policy
CSP header is missing. The site may be vulnerable to XSS attacks.
Add a Content-Security-Policy header to restrict resource loading
- mediumheaders
Missing x-content-type-options
X-Content-Type-Options is missing. MIME-sniffing attacks are possible.
Add X-Content-Type-Options: nosniff header
- mediumheaders
Missing x-frame-options
X-Frame-Options is missing. The site may be vulnerable to clickjacking.
Add X-Frame-Options: DENY or SAMEORIGIN header
- mediummeta
Missing canonical URL
No canonical link tag found
Add a canonical URL to prevent duplicate content issues
- mediummeta
Missing og:title
Open Graph title is not set
Add og:title meta tag for social sharing
- mediummeta
Missing og:image
No Open Graph image set. Social shares will lack a preview image.
Add og:image meta tag (1200x630px recommended)
- mediumstructured data
No structured data found
No JSON-LD schemas detected on the page
Add structured data (Organization, WebSite, BreadcrumbList) for rich search results
- mediumrobots
No sitemap in robots.txt
robots.txt does not reference a sitemap
Add Sitemap: https://yourdomain.com/sitemap.xml to robots.txt
- mediumtechnology
Mixed content detected
4 resources loaded over HTTP on an HTTPS page
Update all resource URLs to use HTTPS
- mediumcontent
Thin content
Page has only 129 words (recommended: 300+)
Add more meaningful content — aim for at least 300 words on key pages
- mediumcontent
External links without noopener
1 external links with target="_blank" lack rel="noopener"
Add rel="noopener noreferrer" to all target="_blank" links
- mediumaccessibility
Missing main landmark
No <main> element or role="main" found
Wrap primary content in a <main> element for screen reader navigation
- mediumaccessibility
No skip navigation link
No skip-to-content link at the top of the page
Add a visually hidden skip link as the first focusable element
- mediumlayout scan
Inconsistent headings
Desktop has 1 H1 tags, mobile has 0
Ensure the same heading structure is served to both mobile and desktop users
- mediumsocial checker
Missing og:description
Open Graph description is not set
Add og:description for better social sharing previews
- mediumsocial checker
Missing og:image
No social sharing image set — posts will lack visual appeal
Add og:image meta tag (1200x630px recommended)
- mediumsocial checker
Missing Twitter Card
No twitter:card meta tag — Twitter/X will use default preview
Add twitter:card meta tag (e.g., "summary_large_image")
- mediumuptime checker
Inconsistent www handling
Both www and non-www versions respond with 200 — one should redirect to the other
Choose either www or non-www as canonical and redirect the other with a 301
- mediumbrand checker
No Organization schema
No Organization JSON-LD found
Add Organization structured data with name, logo, and contact information
- mediumcrawl budget
No sitemap.xml found
sitemap.xml returned HTTP 404
Create a sitemap.xml to help search engines discover all pages
- mediumindexing checker
Missing canonical URL
No canonical link tag found — search engines may index duplicate versions
Add a self-referencing canonical URL to prevent duplicate content issues
Faible (16)
- lowdns
DMARC policy is 'none'
DMARC is set but policy is 'none' (monitoring only).
Consider upgrading DMARC policy to 'quarantine' or 'reject'
- lowdns
Only one MX record (no redundancy)
A single MX record means no failover if the mail server goes down.
Add a secondary MX record for email redundancy
- lowheaders
Missing referrer-policy
Referrer-Policy is not set. Full URLs may leak to third parties.
Add Referrer-Policy: strict-origin-when-cross-origin
- lowheaders
Missing permissions-policy
Permissions-Policy is missing.
Add Permissions-Policy to restrict browser feature access
- lowmeta
Missing og:description
Open Graph description is not set
Add og:description meta tag for social sharing
- lowmeta
Missing Twitter Card
No twitter:card meta tag
Add twitter:card meta tag for Twitter sharing
- lowaccessibility
Missing navigation landmark
No <nav> element or role="navigation" found
Wrap navigation links in a <nav> element
- lowrate limits
No rate limiting detected
No explicit rate-limit headers or 429 responses detected. Cloudflare WAF provides platform-level protection.
Implement rate limiting (e.g., 429 Too Many Requests) to protect against brute-force attacks
- lownews mentions
No press or news presence
No press pages found on the site and no external news mentions detected
Create a /news or /press page with company updates — this builds authority and earns links
- lowsocial checker
Missing og:type
Open Graph type is not set
Add og:type meta tag (e.g., "website", "article")
- lowsocial checker
No social profile links
No links to social media profiles found on the homepage
Add links to your social media profiles for better brand visibility and authority signals
- lowuptime checker
No custom 404 page
The 404 error page appears to be a generic server default
Create a custom 404 page with navigation links and search to retain visitors
- lowbrand checker
No WebSite schema
No WebSite JSON-LD found
Add WebSite structured data for sitelinks search box in Google
- lowbrand checker
No web app manifest
No manifest.json linked — PWA features unavailable
Add a web app manifest for installability and brand customization
- lowbrand checker
Missing og:site_name
Open Graph site name is not set
Add og:site_name meta tag for consistent social sharing
- lowpage experience
No resource hints
No preload or preconnect hints found
Add preload for critical resources and preconnect for important third-party origins
AI Fix Prompt
Copiez ce prompt dans ChatGPT ou Claude pour obtenir des instructions de correction détaillées étape par étape
Fix all SEO issues found in the audit of naisuku.jp.
Prioritize high-severity issues first, then medium. For each fix, make the actual code change — don't just describe what to do.
```json
{
"domain": "naisuku.jp",
"scores": {
"overall": 72,
"performance": 0,
"seo": 65,
"accessibility": 66,
"bestPractices": 81,
"security": 78
},
"findings": [
{
"module": "dns",
"severity": "medium",
"title": "No DKIM record found",
"description": "None of the common DKIM selectors returned a valid key. Email authentication may be incomplete.",
"recommendation": "Configure DKIM signing with your email provider and publish the public key in DNS"
},
{
"module": "headers",
"severity": "high",
"title": "Missing strict-transport-security",
"description": "HSTS header is missing. The site may be vulnerable to downgrade attacks.",
"recommendation": "Add Strict-Transport-Security header with max-age of at least 31536000"
},
{
"module": "headers",
"severity": "medium",
"title": "Missing content-security-policy",
"description": "CSP header is missing. The site may be vulnerable to XSS attacks.",
"recommendation": "Add a Content-Security-Policy header to restrict resource loading"
},
{
"module": "headers",
"severity": "medium",
"title": "Missing x-content-type-options",
"description": "X-Content-Type-Options is missing. MIME-sniffing attacks are possible.",
"recommendation": "Add X-Content-Type-Options: nosniff header"
},
{
"module": "headers",
"severity": "medium",
"title": "Missing x-frame-options",
"description": "X-Frame-Options is missing. The site may be vulnerable to clickjacking.",
"recommendation": "Add X-Frame-Options: DENY or SAMEORIGIN header"
},
{
"module": "meta",
"severity": "medium",
"title": "Missing canonical URL",
"description": "No canonical link tag found",
"recommendation": "Add a canonical URL to prevent duplicate content issues"
},
{
"module": "meta",
"severity": "medium",
"title": "Missing og:title",
"description": "Open Graph title is not set",
"recommendation": "Add og:title meta tag for social sharing"
},
{
"module": "meta",
"severity": "medium",
"title": "Missing og:image",
"description": "No Open Graph image set. Social shares will lack a preview image.",
"recommendation": "Add og:image meta tag (1200x630px recommended)"
},
{
"module": "structured-data",
"severity": "medium",
"title": "No structured data found",
"description": "No JSON-LD schemas detected on the page",
"recommendation": "Add structured data (Organization, WebSite, BreadcrumbList) for rich search results"
},
{
"module": "robots",
"severity": "medium",
"title": "No sitemap in robots.txt",
"description": "robots.txt does not reference a sitemap",
"recommendation": "Add Sitemap: https://yourdomain.com/sitemap.xml to robots.txt"
},
{
"module": "sitemap",
"severity": "high",
"title": "Missing sitemap.xml",
"description": "No sitemap.xml found at the root",
"recommendation": "Create a sitemap.xml to help search engines discover all pages"
},
{
"module": "technology",
"severity": "medium",
"title": "Mixed content detected",
"description": "4 resources loaded over HTTP on an HTTPS page",
"recommendation": "Update all resource URLs to use HTTPS"
},
{
"module": "content",
"severity": "medium",
"title": "Thin content",
"description": "Page has only 129 words (recommended: 300+)",
"recommendation": "Add more meaningful content — aim for at least 300 words on key pages"
},
{
"module": "content",
"severity": "high",
"title": "Images missing alt text",
"description": "3 image(s) have no alt attribute",
"recommendation": "Add descriptive alt text to all images for accessibility and SEO"
},
{
"module": "content",
"severity": "medium",
"title": "External links without noopener",
"description": "1 external links with target=\"_blank\" lack rel=\"noopener\"",
"recommendation": "Add rel=\"noopener noreferrer\" to all target=\"_blank\" links"
},
{
"module": "accessibility",
"severity": "high",
"title": "3 images missing alt attribute",
"description": "Images without alt text are inaccessible to screen readers",
"recommendation": "Add descriptive alt text to all informational images, or alt=\"\" for decorative ones"
},
{
"module": "accessibility",
"severity": "medium",
"title": "Missing main landmark",
"description": "No <main> element or role=\"main\" found",
"recommendation": "Wrap primary content in a <main> element for screen reader navigation"
},
{
"module": "accessibility",
"severity": "medium",
"title": "No skip navigation link",
"description": "No skip-to-content link at the top of the page",
"recommendation": "Add a visually hidden skip link as the first focusable element"
},
{
"module": "layout-scan",
"severity": "medium",
"title": "Inconsistent headings",
"description": "Desktop has 1 H1 tags, mobile has 0",
"recommendation": "Ensure the same heading structure is served to both mobile and desktop users"
},
{
"module": "social-checker",
"severity": "high",
"title": "Missing og:title",
"description": "Open Graph title is not set — social shares will use generic text",
"recommendation": "Add og:title meta tag for compelling social media previews"
},
{
"module": "social-checker",
"severity": "medium",
"title": "Missing og:description",
"description": "Open Graph description is not set",
"recommendation": "Add og:description for better social sharing previews"
},
{
"module": "social-checker",
"severity": "medium",
"title": "Missing og:image",
"description": "No social sharing image set — posts will lack visual appeal",
"recommendation": "Add og:image meta tag (1200x630px recommended)"
},
{
"module": "social-checker",
"severity": "medium",
"title": "Missing Twitter Card",
"description": "No twitter:card meta tag — Twitter/X will use default preview",
"recommendation": "Add twitter:card meta tag (e.g., \"summary_large_image\")"
},
{
"module": "uptime-checker",
"severity": "medium",
"title": "Inconsistent www handling",
"description": "Both www and non-www versions respond with 200 — one should redirect to the other",
"recommendation": "Choose either www or non-www as canonical and redirect the other with a 301"
},
{
"module": "brand-checker",
"severity": "medium",
"title": "No Organization schema",
"description": "No Organization JSON-LD found",
"recommendation": "Add Organization structured data with name, logo, and contact information"
},
{
"module": "crawl-budget",
"severity": "medium",
"title": "No sitemap.xml found",
"description": "sitemap.xml returned HTTP 404",
"recommendation": "Create a sitemap.xml to help search engines discover all pages"
},
{
"module": "indexing-checker",
"severity": "medium",
"title": "Missing canonical URL",
"description": "No canonical link tag found — search engines may index duplicate versions",
"recommendation": "Add a self-referencing canonical URL to prevent duplicate content issues"
}
]
}
```Recommandations pour votre secteur
- 1Assurer la conformité aux normes d'accessibilité WCAG 2.1 AA
- 2Mettre en place tous les en-têtes de sécurité recommandés
- 3Vérifier que le sitemap couvre toutes les pages clés
- 4Optimiser le temps de chargement des pages à moins de 2 secondes
- 5Garantir un affichage parfaitement responsive sur toutes les pages
Liste de contrôle SEO pour Général
Conseils pour les sites de type Mixte
- →Créez des pages de destination ciblées pour chaque audience
- →Appliquez des métadonnées distinctes par groupe de pages
- →Segmentez votre sitemap par typologie de contenu
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