What powers 
jastro.or.jp?
Last seen Oct 2026 · 5 technologies across 3 categories
Analytics
JavaScript libraries
Web servers
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 search keywords
| Keyword | Position | Est. monthly visits |
|---|---|---|
| tg 53 | #22 | 0 |
| tg 100 | #25 | 0 |
| radiation in japanese | #20 | 0 |
| rtog 91 11 | #48 | 0 |
| journal of radiation oncology | #68 | 0 |
| aapm tg-53 | #20 | 0 |
| aapm tg-100 | #36 | 0 |
| ifrt | #58 | 0 |
The site's top keywords in Google (US), with the visits each one is estimated to bring per month.
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
- 69% desktop
- 31% phone
Japan
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
5.69 / 10 · ranked #137,854 of all domains
132 referring domains · OpenPageRank
Search traffic
0 est. monthly organic visits (US)
8 keywords in Google's top 30
Core Web Vitals
| LCP | 0.9 s |
| INP | 50 ms |
| CLS | 0 |
| TTFB | 300 ms |
Real user p75, Chrome UX Report, Oct 2026.
Page
- Language: Japanese
- Weight: 5.9 MB · 76 requests
Homepage as crawled by the HTTP Archive, Oct 2026.
Infrastructure
- Hosted on CPI-NET - KDDI Web Communications Inc. (194.91.14.129)
- DNS: cpi.ad.jp
- Email: secure.ne.jp
- Email security: SPF (hard fail), DMARC monitor only
- SSL: JPRS, RSA 2048, expires Jan 2027
- Common Crawl link graph: rank 741,726, 3 hosts
DNS records as swept Nov 2026, certificate as seen Nov 2026. How the web is hosted