GeneralMixed
SEO Report: deview.co.jp
2026年5月1日 · 41 findings
78
Institutional websites prioritize accessibility, security, and proper indexing — citizens and stakeholders need easy access to relevant information.
Score Breakdown
Average General score: 50
seo
76(+31 vs avg)
security
82(+24 vs avg)
performance
0(-44 vs avg)
accessibility
66(+14 vs avg)
Best Practices
86(+30 vs avg)
主要な発見
- 重大No H1 tag found
Add exactly one H1 tag with the primary keyword
- 重大Images missing alt text
Add descriptive alt text to all images for accessibility and SEO
- 重大Missing strict-transport-security
Add Strict-Transport-Security header with max-age of at least 31536000
- 重大17 images missing alt attribute
Add descriptive alt text to all informational images, or alt="" for decorative ones
- 重大Intrusive interstitials detected
Reduce intrusive interstitials — they hurt mobile experience and can trigger Google penalties
Recommendations for your industry
- 1Ensure WCAG 2.1 AA compliance
- 2Implement all recommended security headers
- 3Ensure sitemap covers all important pages
- 4Optimize page load time to under 2 seconds
- 5Ensure responsive design on all pages
SEO Checklist for General
Tips for Mixed websites
- →Define clear landing pages for each segment
- →Use different meta strategies per page group
- →Segment sitemap by content type