What powers seibo.ed.jp?
Last seen Jun 2026 · 27 technologies across 14 categories
CDN
CMS
WordPress
since Jan 2019
Databases
MySQL
since Jan 2019
JavaScript frameworks
JavaScript libraries
Lightbox
since Jan 2019
Miscellaneous
Webpack
since Feb 2025
PaaS
Amazon Web Services
since Oct 2023
Vercel
since Feb 2025
Performance
Priority Hints
since Feb 2025
Programming languages
Security
UI frameworks
MUI
since Sep 2025
Tailwind CSS
since Feb 2025
Web servers
Webmail
Microsoft 365
since Oct 2023
WordPress plugins
Contact Form 7
since Feb 2022
Audience
- 76% phone
- 24% desktop
Japan
Countries where the site has Chrome traffic, strongest markets first.
Open Page Rank
4.17 / 10 · ranked #471,227 of all domains
64 referring domains · OpenPageRank
Core Web Vitals
| LCP | 1.1 s |
| INP | 50 ms |
| CLS | 0 |
| TTFB | 500 ms |
Real user p75, Chrome UX Report, Jun 2026.
Page
- Language: Japanese
- Weight: 2.2 MB · 80 requests
- WordPress theme: 2017l · all themes
Homepage as crawled by the HTTP Archive, Jul 2026.
Subdomains
| Host | Techs |
|---|---|
| www.seibo.ed.jp | 15 |
| recruit.seibo.ed.jp | 10 |
| apps.seibo.ed.jp | 8 |
Full technology history →
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Recent changes
- detected reCAPTCHA Dec 2025