What powers jsu.or.jp?
Last seen Aug 2026 · 8 technologies across 8 categories
Analytics
Google Analytics
since Jan 2019
JavaScript libraries
Operating systems
CentOS
since Jan 2019
PaaS
Amazon Web Services
since Apr 2025
Programming languages
PHP
since Aug 2021
Tag managers
Google Tag Manager
since Aug 2025
Video players
YouTube
since May 2021
Web servers
AI Crawlers
No robots.txt, so all AI crawlers are allowed by default. Checked Sep 2026.
- robots.txt not found
- llms.txt not found
- ai.txt not found
AI Crawlers
No robots.txt, all AI crawlers allowed
Audience
- 65% phone
- 35% desktop
Japan
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
4.07 / 10 · ranked #525,290 of all domains
55 referring domains · OpenPageRank
Core Web Vitals
| LCP | 0.9 s |
| INP | 250 ms |
| CLS | 0 |
| TTFB | 400 ms |
Real user p75, Chrome UX Report, Aug 2026.
Page
- Language: Japanese
- Weight: 2.5 MB · 90 requests
Homepage as crawled by the HTTP Archive, Sep 2026.
Organisation
- All Japan Seamen’s Union
- Founded: 1945
- Country: Japan
From Wikidata (CC0).
Infrastructure
- DNS: Amazon Route 53
- Email: no MX record returned
- SSL: JPRS, RSA 2048, expires Oct 2026
- Common Crawl link graph: rank 656,288
DNS records as swept Sep 2026, certificate as seen Sep 2026. How the web is hosted
Full technology history →
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