What powers 
jrrc.or.jp?
Last seen Sep 2026 · 18 technologies across 11 categories
Analytics
Google Analytics
since Jan 2019
CMS
WordPress
since Jan 2019
Databases
MySQL
since Jan 2019
Font scripts
Font Awesome
since Jan 2019
Google Font API
since Jan 2019
JavaScript frameworks
JavaScript libraries
Performance
Priority Hints
since Dec 2024
Programming languages
Security
reCAPTCHA
since Jan 2019
Web servers
Apache HTTP Server
since Mar 2025
Nginx
since Jan 2019
WordPress plugins
AI Crawlers
Doesn't name any of the 33 AI crawlers we track in its robots.txt. Catch-all rules (User-agent: *) restrict some paths for every crawler, AI or not. Checked Oct 2026.
- robots.txt found
- llms.txt not found
- ai.txt not found
- Sep 2026 *: Restricted (was Allowed)
- Aug 2026 *: Allowed (was Restricted)
AI Crawlers
No AI crawlers blocked
Audience
- 75% desktop
- 25% phone
Japan
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
4.91 / 10 · ranked #256,383 of all domains
72 referring domains · OpenPageRank
Core Web Vitals
| LCP | 1.4 s |
| INP | 50 ms |
| CLS | 0.05 |
| TTFB | 800 ms |
Real user p75, Chrome UX Report, Sep 2026.
Page
- Language: Japanese
- Weight: 5.8 MB · 84 requests
- WordPress theme: monolith_tcd042 · all themes
Homepage as crawled by the HTTP Archive, Oct 2026.
Organisation
- Japan Reproduction Rights Center
- Founded: 1991
- Country: Japan
From Wikidata (CC0).
Infrastructure
- Hosted on Sakura Internet (112.78.112.72)
- DNS: Onamae.com
- Email: Sakura Internet
- Email security: SPF (soft fail), DMARC monitor only
- SSL: Let's Encrypt, RSA 2048, expires Jan 2027
- Common Crawl link graph: rank 1,244,496, 4 hosts
- Verified with: Google
DNS records as swept Oct 2026, certificate as seen Oct 2026. How the web is hosted
Subdomains
| Host | Techs |
|---|---|
| jrrc.or.jp | 16 |
| duck.jrrc.or.jp | 6 |
| system.jrrc.or.jp | 1 |