What powers 
central.or.jp?
Last seen Aug 2026 · 16 technologies across 10 categories
Analytics
Google Analytics
since Jan 2019
CDN
cdnjs
since Nov 2021
Cloudflare
since May 2022
jQuery CDN
since Feb 2022
jsDelivr
since Oct 2023
Unpkg
since Oct 2023
Font scripts
Google Font API
since Oct 2023
Hosting
Sakura Internet
since Aug 2022
Hosting panels
Plesk
since Oct 2023
JavaScript libraries
Miscellaneous
Open Graph
since Sep 2022
Programming languages
UI frameworks
Web servers
Nginx
since Jan 2019
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
- Sep 2026 robots.txt appeared
- Sep 2026 * added to robots.txt
AI Crawlers
No AI crawlers blocked
Audience
- 88% phone
- 12% desktop
Japan
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
4.10 / 10 · ranked #507,527 of all domains
54 referring domains · OpenPageRank
Core Web Vitals
| LCP | 0.9 s |
| INP | 75 ms |
| CLS | 0 |
| TTFB | 300 ms |
Real user p75, Chrome UX Report, Aug 2026.
Page
- Language: Japanese
- Weight: 3.6 MB · 109 requests
- Structured data: OpenGraph, Twitter Cards
Homepage as crawled by the HTTP Archive, Sep 2026.
Organisation
- Tsukuba Central Hospital
- Country: Japan
From Wikidata (CC0).
Infrastructure
- Hosted on TSUKAERUNET Tsukaeru.net, Web Hosting Company, Japan (119.82.24.238)
- DNS: Sakura Internet
- Email: kagoya.net
- Email security: SPF (soft fail), DMARC monitor only
- SSL: Let's Encrypt, RSA 2048, expires Dec 2026
- Common Crawl link graph: rank 10,019,249, 6 hosts
- Verified with: Google
DNS records as swept Sep 2026, certificate as seen Sep 2026. How the web is hosted
Subdomains
| Host | Techs |
|---|---|
| www.central.or.jp | 16 |
| central.or.jp | 14 |
| clinic.central.or.jp | 14 |
| tsuchiura-reha.central.or.jp | 14 |
| recruit.central.or.jp | 13 |