What powers jrc-lib.jp?
Last seen Jun 2026 · 7 technologies across 7 categories
Analytics
Google Analytics
since Jun 2020
CMS
Concrete CMS
since Apr 2026
Hosting
Xserver
since Apr 2026
JavaScript libraries
Miscellaneous
Open Graph
since Apr 2026
Programming languages
PHP
since Jun 2020
Web servers
Nginx
since Dec 2021
Audience
- 85% desktop
- 15% phone
Japan
Countries where the site has Chrome traffic, strongest markets first.
Open Page Rank
1.70 / 10 · ranked #4,965,111 of all domains
4 referring domains · OpenPageRank
Core Web Vitals
| LCP | 0.7 s |
| CLS | 0 |
| TTFB | 300 ms |
Real user p75, Chrome UX Report, Jun 2026.
Page
- Language: Japanese
- Weight: 4.4 MB · 32 requests
- Structured data: OpenGraph
Homepage as crawled by the HTTP Archive, Jul 2026.
Full technology history →
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Recent changes
- dropped HSTS May 2026
- dropped MySQL May 2026
- dropped Plesk May 2026
- dropped WordPress May 2026
- detected Concrete CMS Apr 2026
- detected Open Graph Apr 2026
- detected Xserver Apr 2026