What powers saigakukan.co.jp?
Last seen Sep 2026 · 22 technologies across 12 categories
Analytics
CDN
CMS
Databases
Font scripts
JavaScript frameworks
JavaScript libraries
Miscellaneous
Programming languages
Security
Tag managers
Web servers
AI Crawlers
Doesn't name any of the 33 AI crawlers we track in its robots.txt. Catch-all rules (User-agent: *) restrict some paths for every crawler, AI or not. Checked Sep 2026.
- robots.txt found
- llms.txt not found
- ai.txt not found
AI Crawlers
No AI crawlers blocked
Audience
- 62% phone
- 38% desktop
Japan
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
2.70 / 10 · ranked #2,166,869 of all domains
12 referring domains · OpenPageRank
Core Web Vitals
| LCP | 1.9 s |
| INP | 75 ms |
| CLS | 0.5 |
| TTFB | 800 ms |
Real user p75, Chrome UX Report, Aug 2026.
Page
- Language: Japanese
- Weight: 13.0 MB · 200 requests
- WordPress theme: saigakukan2021 · all themes
- Structured data: OpenGraph
Homepage as crawled by the HTTP Archive, Sep 2026.
Infrastructure
- Hosted on GMO Internet (157.7.44.238)
- DNS: Muumuu Domain
- Email: heteml.jp
- Email security: SPF (soft fail), no DMARC record
- SSL: GlobalSign, RSA 2048, expires Feb 2027
- Common Crawl link graph: rank 10,612,120
DNS records as swept Sep 2026, certificate as seen Sep 2026. How the web is hosted
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Recent changes
- dropped GSAP Jul 2026
- detected Twitter Emoji (Twemoji) Dec 2025