What powers 
edumap.jp?
Last seen Oct 2026 · 24 technologies across 17 categories
Advertising
Analytics
Comment systems
Font scripts
JavaScript Frameworks
JavaScript libraries
Maps
Performance
Programming languages
Rich text editors
Security
Tag managers
UI frameworks
Video players
Web 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 Nov 2026.
- robots.txt found
- llms.txt not found
- ai.txt not found
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
- 80% phone
- 20% desktop
Japan
United States
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
6.53 / 10 · ranked #74,033 of all domains
223 referring domains · OpenPageRank
Core Web Vitals
| LCP | 1 s |
| INP | 50 ms |
| CLS | 0 |
| TTFB | 300 ms |
Real user p75, Chrome UX Report, Sep 2026.
Page
- Language: Japanese
- Weight: 1.6 MB · 104 requests
Homepage as crawled by the HTTP Archive, Oct 2026.
Organisation
- Surabaya Japanese School
- Founded: 1979
- Country: Indonesia
From Wikidata (CC0).
Infrastructure
- Hosted on Sakura Internet (133.242.53.53)
- DNS: Sakura Internet
- Email: Sakura Internet
- Email security: SPF (soft fail), no DMARC record
- SSL: JPRS, RSA 2048, wildcard, expires Jan 2027
- Common Crawl link graph: rank 96,504, 915 hosts
DNS records as swept Nov 2026, certificate as seen Nov 2026. How the web is hosted
Subdomains
| Host | Techs |
|---|---|
| shibafuji-es-kawaguchi-saitama.edumap.jp | 16 |
| shichigahamasiomi-es.edumap.jp | 16 |
| esashi-junior-high-school.edumap.jp | 15 |
| hitachi-yunago-e.edumap.jp | 15 |
| ichinoseki-daichu.edumap.jp | 15 |
| ichinoseki-hanachu.edumap.jp | 15 |
| izumi.edumap.jp | 15 |
| jyoko-e-konosu.edumap.jp | 15 |
| kamesho.edumap.jp | 15 |
| kujira-mikumo-hoikuen-konan-sg.edumap.jp | 15 |
| kyowa-e-konosu.edumap.jp | 15 |
| niiharu-es.edumap.jp | 15 |
| nishi-e-warabi.edumap.jp | 15 |
| suzukake.edumap.jp | 15 |
| tsukagoshi-e-warabi.edumap.jp | 15 |
| wakkanai-minatosyo.edumap.jp | 15 |
| edumap.jp | 14 |
| hitachi-oomika-e.edumap.jp | 14 |
| ichinoseki-fujichu.edumap.jp | 14 |
| morita-es.edumap.jp | 14 |
| tonda-j-h-s-shirahama-town.edumap.jp | 14 |
| akami-j.edumap.jp | 13 |
| akamidai-j-konosu.edumap.jp | 13 |
| aoyagi-e-kamikawa.edumap.jp | 13 |
Full technology history →
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Recent changes
- detected Priority Hints Aug 2026
- detected Google Publisher Tag Mar 2026
- dropped Google Font API Feb 2026
- detected Google Font API Dec 2025