What powers seisen.co?
Last seen Jun 2026 · 16 technologies across 13 categories
Analytics
Google Analytics
since Jun 2021
Authentication
Facebook Login
since Jul 2021
CDN
Google Cloud CDN
since Jun 2026
Databases
Firebase
since Jun 2026
Font scripts
Google Font API
since Jun 2026
IaaS
Google Cloud
since Jun 2026
JavaScript frameworks
JavaScript libraries
Miscellaneous
HTTP/3
since Jun 2026
Open Graph
since Jun 2026
Page builders
STUDIO
since Jun 2026
Programming languages
Node.js
since Jun 2026
Tag managers
Google Tag Manager
since Jun 2026
Web servers
Apache HTTP Server
since Jun 2021
Audience
- 100% phone
Japan
Countries where the site has Chrome traffic, strongest markets first.
Open Page Rank
1.02 / 10 · ranked #12,257,836 of all domains
4 referring domains · OpenPageRank
Core Web Vitals
| LCP | 2.9 s |
| INP | 125 ms |
| CLS | 0 |
| TTFB | 500 ms |
Real user p75, Chrome UX Report, Jun 2026.
Page
- Language: Japanese
- CDN: Google
- Weight: 6.3 MB · 95 requests
- Structured data: OpenGraph
Homepage as crawled by the HTTP Archive, Jul 2026.