What powers yushokan.co.jp?
Last seen Sep 2026 · 9 technologies across 7 categories
Analytics
CDN
CMS
JavaScript frameworks
JavaScript libraries
Miscellaneous
Security
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 Sep 2026.
- robots.txt found
- llms.txt not found
- ai.txt not found
AI Crawlers
No AI crawlers blocked
Audience
Japan
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
2.02 / 10 · ranked #3,539,181 of all domains
7 referring domains · OpenPageRank
Core Web Vitals
| LCP | 1.5 s |
| INP | 25 ms |
| CLS | 0 |
| TTFB | 1000 ms |
Real user p75, Chrome UX Report, Aug 2026.
Page
- Language: Japanese (Japan)
- CDN: Cloudflare
- Weight: 2.3 MB · 123 requests
- Structured data: OpenGraph, Twitter Cards
Homepage as crawled by the HTTP Archive, Sep 2026.
Infrastructure
- Hosted on Cloudflare (185.60.251.251)
- DNS: alpha-mail.jp
- Email: alpha-mail.net
- Email security: SPF (soft fail), no DMARC record
- SSL: Google Trust Services, ECDSA P256, expires Dec 2026
- Common Crawl link graph: rank 12,270,739
DNS records as swept Sep 2026, certificate as seen Sep 2026. How the web is hosted
Full technology history →
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Recent changes
- dropped Nginx May 2026
- detected Cloudflare Apr 2026
- detected Cloudflare Bot Management Apr 2026
- dropped core-js Apr 2026
- detected HTTP/3 Apr 2026