What powers 
kodomomiraikan.jp?
Last seen Sep 2026 · 12 technologies across 10 categories
Analytics
Google Analytics
since Jan 2019
Font scripts
Google Font API
since May 2025
Hosting panels
Plesk
since Jan 2019
JavaScript libraries
Miscellaneous
Open Graph
since Sep 2022
Photo galleries
PhotoSwipe
since Sep 2022
Rich text editors
UI frameworks
Animate.css
since May 2025
Video players
YouTube
since May 2025
Web servers
Apache HTTP Server
since Jan 2019
AI Crawlers
No robots.txt, so all AI crawlers are allowed by default. Checked Oct 2026.
- robots.txt not found
- llms.txt not found
- ai.txt not found
AI Crawlers
No robots.txt, all AI crawlers allowed
Audience
- 82% phone
- 18% desktop
Japan
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
4.01 / 10 · ranked #563,143 of all domains
59 referring domains · OpenPageRank
Core Web Vitals
| LCP | 1.7 s |
| INP | 75 ms |
| CLS | 0 |
| TTFB | 900 ms |
Real user p75, Chrome UX Report, Sep 2026.
Page
- Language: Japanese
- Weight: 4.0 MB · 130 requests
- Structured data: JSON-LD, OpenGraph
Homepage as crawled by the HTTP Archive, Oct 2026.
Organisation
- sakumo佐久市子ども未来館 (Saku Children's Science Dome for the Future on Wikidata)
- Founded: 2001
- Country: Japan
From the homepage's own structured data (Oct 2026) and Wikidata (CC0).
Infrastructure
- Hosted on FUTURE Future Spirits Co.,Ltd. (219.99.166.105)
- DNS: asp-frontier.net
- Email: kodomomiraikan.jp
- Email security: SPF (soft fail), DMARC monitor only
- SSL: Let's Encrypt, RSA 2048, expires Dec 2026
- Common Crawl link graph: rank 1,206,132
DNS records as swept Oct 2026, certificate as seen Oct 2026. How the web is hosted
Full technology history →
Report an incorrect detection
Recent changes
- detected Apache HTTP Server Sep 2026
- dropped Nginx Feb 2026