What powers 
jrt.gr.jp?
Last seen Aug 2026 · 25 technologies across 18 categories
Advertising
Analytics
Authentication
CDN
CMS
Databases
Font scripts
Hosting
JavaScript libraries
Maps
Miscellaneous
Programming languages
Security
Tag managers
UI frameworks
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 Sep 2026.
- robots.txt found
- llms.txt not found
- ai.txt not found
- Sep 2026 robots.txt appeared
- Sep 2026 * added to robots.txt
- Sep 2026 * removed from robots.txt
- Aug 2026 robots.txt removed
AI Crawlers
No AI crawlers blocked
Audience
- 75% phone
- 22% desktop
- 3% tablet
Japan
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
3.78 / 10 · ranked #726,375 of all domains
42 referring domains · OpenPageRank
Core Web Vitals
| LCP | 1.9 s |
| INP | 225 ms |
| CLS | 0 |
| TTFB | 1000 ms |
Real user p75, Chrome UX Report, Aug 2026.
Page
- Language: Japanese
- Weight: 3.3 MB · 140 requests
- WordPress theme: lightning (child: jrtweb) · all themes
- Structured data: JSON-LD, OpenGraph, Twitter Cards
Homepage as crawled by the HTTP Archive, Sep 2026.
Infrastructure
- Hosted on Sakura Internet (219.94.155.245)
- DNS: Sakura Internet
- Email: Google Workspace
- Email security: no SPF record, no DMARC record
- SSL: Let's Encrypt, RSA 2048, expires Dec 2026
- Common Crawl link graph: rank 1,108,090, 4 hosts
DNS records as swept Sep 2026, certificate as seen Sep 2026. How the web is hosted
Subdomains
| Host | Techs |
|---|---|
| www.jrt.gr.jp | 23 |
| jrt.gr.jp | 21 |
| sp.jrt.gr.jp | 18 |
| potato-museum.jrt.gr.jp | 2 |
Full technology history →
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Recent changes
- detected Facebook Login Jul 2026
- detected Twitter Emoji (Twemoji) Feb 2026