What powers 
seijogakuen.ed.jp?
Last seen Sep 2026 · 13 technologies across 11 categories
Analytics
Google Analytics
since Jan 2019
CDN
CMS
Font scripts
Google Font API
since Feb 2019
JavaScript libraries
Miscellaneous
Open Graph
since Sep 2022
PaaS
Amazon Web Services
since Jun 2024
Programming languages
PHP
since Dec 2019
Tag managers
Google Tag Manager
since Jul 2022
Web servers
Nginx
since May 2024
Webmail
Apple iCloud Mail
since Jan 2023
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
4.92 / 10 · ranked #255,562 of all domains
104 referring domains · OpenPageRank
Core Web Vitals
| LCP | 0.9 s |
| INP | 75 ms |
| CLS | 0 |
| TTFB | 300 ms |
Real user p75, Chrome UX Report, Aug 2026.
Page
- Language: Japanese
- CDN: Amazon CloudFront
- Weight: 4.3 MB · 89 requests
- Structured data: OpenGraph
Homepage as crawled by the HTTP Archive, Sep 2026.
Organisation
- Seijo Gakuen Junior High School and High School
- Founded: 1947
- Country: Japan
From Wikidata (CC0).
Infrastructure
- DNS: d-53.info
- Email: seijogakuen.ed.jp
- Email security: SPF (soft fail), DMARC monitor only
- SSL: Amazon Trust Services, RSA 2048, expires Mar 2027
- Common Crawl link graph: rank 102,350, 3 hosts
- Verified with: Apple Business
DNS records as swept Sep 2026, certificate as seen Sep 2026. How the web is hosted
Subdomains
| Host | Techs |
|---|---|
| www.seijogakuen.ed.jp | 10 |
| fund.seijogakuen.ed.jp | 8 |