What powers seirankai.or.jp?
Last seen Jun 2026 · 19 technologies across 9 categories
Analytics
Microsoft Clarity
since Jan 2022
CDN
Amazon CloudFront
since Apr 2019
cdnjs
since Jan 2024
Cloudflare
since Jan 2024
jQuery CDN
since Jan 2024
jsDelivr
since Jul 2020
Unpkg
since Jul 2021
Font scripts
JavaScript libraries
Miscellaneous
Open Graph
since Sep 2022
PaaS
Amazon Web Services
since Apr 2019
Tag managers
Google Tag Manager
since Jul 2021
Web server extensions
Web servers
Nginx
since May 2026
Audience
- 54% desktop
- 46% phone
Japan
Countries where the site has Chrome traffic, strongest markets first.
Open Page Rank
3.72 / 10 · ranked #754,786 of all domains
35 referring domains · OpenPageRank
Core Web Vitals
| LCP | 1.3 s |
| INP | 50 ms |
| CLS | 0 |
| TTFB | 800 ms |
Real user p75, Chrome UX Report, Jun 2026.
Page
- CDN: Amazon CloudFront
- Weight: 12.2 MB · 103 requests
- Structured data: OpenGraph
Homepage as crawled by the HTTP Archive, Jul 2026.
Subdomains
| Host | Techs |
|---|---|
| www.seirankai.or.jp | 18 |
| tokyo.seirankai.or.jp | 2 |