What powers c21thl.co.jp?
Last seen Jun 2026 · 19 technologies across 14 categories
Advertising
AD EBiS
since Aug 2022
Analytics
Google Analytics
since Jul 2019
Microsoft Clarity
since Jul 2023
CDN
Font scripts
Google Font API
since Jul 2021
JavaScript libraries
Miscellaneous
Popper
since Aug 2022
Operating systems
CentOS
since Jul 2019
Performance
Priority Hints
since Mar 2026
Programming languages
Tag managers
Google Tag Manager
since Jul 2019
UI frameworks
Video players
YouTube
since Jul 2021
Web servers
Webmail
Google Workspace
since Aug 2022
Audience
Japan
Countries where the site has Chrome traffic, strongest markets first.
Open Page Rank
0.97 / 10 · ranked #13,217,693 of all domains
1 referring domains · OpenPageRank
Core Web Vitals
| LCP | 3.1 s |
| CLS | 0.05 |
| TTFB | 1600 ms |
Real user p75, Chrome UX Report, Jun 2026.
Page
- Language: Japanese
- Weight: 7.9 MB · 123 requests
Homepage as crawled by the HTTP Archive, Jul 2026.
Subdomains
| Host | Techs |
|---|---|
| home.c21thl.co.jp | 17 |
| www.c21thl.co.jp | 10 |
Full technology history →
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Recent changes
- detected Priority Hints Mar 2026