What powers jsfee.jp?
Last seen Aug 2026 · 23 technologies across 15 categories
Advertising
CDN
CMS
Databases
Font scripts
Hosting
JavaScript libraries
Miscellaneous
Performance
Programming languages
Security
SEO
UI frameworks
Web servers
Widgets
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
3.38 / 10 · ranked #1,033,517 of all domains
29 referring domains · OpenPageRank
Core Web Vitals
| LCP | 2 s |
| INP | 50 ms |
| CLS | 0 |
| TTFB | 1200 ms |
Real user p75, Chrome UX Report, Aug 2026.
Page
- Language: Japanese
- Weight: 11.2 MB · 65 requests
- Structured data: JSON-LD, Microdata, OpenGraph, Twitter Cards
Homepage as crawled by the HTTP Archive, Sep 2026.
Organisation
- 一般社団法人 日本環境教育学会
From the homepage's own structured data (Sep 2026).
Infrastructure
- Hosted on Sakura Internet (219.94.155.239)
- Email: jsfee.jp
- Email security: SPF (soft fail), no DMARC record
- SSL: Let's Encrypt, RSA 2048, expires Oct 2026
- Common Crawl link graph: rank 8,276,557, 5 hosts
DNS records as swept Sep 2026, certificate as seen Sep 2026. How the web is hosted
Subdomains
| Host | Techs |
|---|---|
| www.jsfee.jp | 16 |
| www.old.jsfee.jp | 12 |