What powers 
ryuhoku-sf.jp?
Last seen Sep 2026 · 8 technologies across 6 categories
Analytics
Authentication
Facebook Login
since Jul 2021
JavaScript libraries
Miscellaneous
Open Graph
since Sep 2022
Security
HSTS
since Sep 2022
Web servers
Apache HTTP Server
since Sep 2020
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
- 100% phone
Japan
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
3.95 / 10 · ranked #607,555 of all domains
23 referring domains · OpenPageRank
Core Web Vitals
| LCP | 0.8 s |
| INP | 50 ms |
| CLS | 0 |
| TTFB | 300 ms |
Real user p75, Chrome UX Report, Aug 2026.
Page
- Weight: 5.4 MB · 91 requests
- Structured data: OpenGraph
Homepage as crawled by the HTTP Archive, Sep 2026.
Infrastructure
- Hosted on ODN SoftBank Corp. (211.8.145.95)
- DNS: hostpro.ne.jp
- Email: hostpro.ne.jp
- Email security: no SPF record, no DMARC record
- SSL: Nijimo, Inc., RSA 2048, expires Feb 2027
- Common Crawl link graph: rank 13,216,599, 2 hosts
DNS records as swept Sep 2026, certificate as seen Sep 2026. How the web is hosted
Subdomains
| Host | Techs |
|---|---|
| ryuhoku-sf.jp | 8 |
| www.ryuhoku-sf.jp | 8 |