What powers 
rsn-sakura.jp?
Last seen Oct 2026 · 16 technologies across 13 categories
Analytics
CDN
CMS
Databases
Font scripts
Hosting
JavaScript libraries
Miscellaneous
Performance
Programming languages
Web servers
WordPress plugins
WordPress themes
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 Nov 2026.
- robots.txt found
- llms.txt not found
- ai.txt not found
Top backlinks
Top links pointing at the site, one per source domain, strongest first. The anchor text opens the page carrying the link.
AI Crawlers
No AI crawlers blocked
Audience
- 72% phone
- 28% desktop
Japan
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
5.40 / 10 · ranked #171,925 of all domains
90 referring domains · OpenPageRank
Core Web Vitals
| LCP | 1.9 s |
| INP | 75 ms |
| CLS | 0.1 |
| TTFB | 1100 ms |
Real user p75, Chrome UX Report, Sep 2026.
Page
- Language: Japanese
- Weight: 1.1 MB · 58 requests
- WordPress theme: twentyeleven (child: rsn) · all themes
- Structured data: JSON-LD, OpenGraph
Homepage as crawled by the HTTP Archive, Oct 2026.
Organisation
- 認定特定非営利活動法人
From the homepage's own structured data (Oct 2026).
Infrastructure
- Hosted on Sakura Internet (219.94.155.208)
- DNS: Sakura Internet
- Email: rsn-sakura.jp
- Email security: SPF (soft fail), no DMARC record
- SSL: Let's Encrypt, RSA 2048, expires Jan 2027
- Common Crawl link graph: rank 7,762,787, 3 hosts
- Verified with: Google
DNS records as swept Nov 2026, certificate as seen Nov 2026. How the web is hosted
Full technology history →
Report an incorrect detection
Recent changes
- detected Priority Hints May 2026
- detected Twitter Emoji (Twemoji) May 2026
- dropped FingerprintJS Mar 2026