What powers 
ibrc.or.jp?
Last seen Sep 2026 · 9 technologies across 6 categories
Analytics
Google Analytics
since Oct 2022
CMS
Google Sites
since Oct 2022
Font scripts
Google Font API
since Oct 2022
JavaScript libraries
Closure Library
since Oct 2023
Marked
since Jul 2026
Miscellaneous
Open Graph
since Oct 2022
Webmail
Google Workspace
since Oct 2022
AI Crawlers
No robots.txt, so all AI crawlers are allowed by default. Checked Oct 2026.
- robots.txt not found
- llms.txt not found
- ai.txt not found
AI Crawlers
No robots.txt, all AI crawlers allowed
Audience
Japan
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
3.44 / 10 · ranked #960,718 of all domains
23 referring domains · OpenPageRank
Core Web Vitals
| LCP | 1.4 s |
| INP | 50 ms |
| CLS | 0 |
| TTFB | 600 ms |
Real user p75, Chrome UX Report, Sep 2026.
Page
- Language: English (United States)
- CDN: Google
- Weight: 2.7 MB · 53 requests
- Structured data: Microdata, OpenGraph
Homepage as crawled by the HTTP Archive, Sep 2026.
Infrastructure
- DNS: Onamae.com
- Email: Google Workspace
- Email security: no SPF record, no DMARC record
- SSL: Google Trust Services, RSA 2048, expires Dec 2026
- Common Crawl link graph: rank 94,428, 11 hosts
DNS records as swept Oct 2026, certificate as seen Oct 2026. How the web is hosted
Subdomains
| Host | Techs |
|---|---|
| www.ibrc.or.jp | 8 |
| gentian.ibrc.or.jp | 7 |
Full technology history →
Report an incorrect detection
Recent changes
- detected Marked Jul 2026
- detected Closure Library Jan 2026