What powers ctb.ac.jp?
Last seen Jun 2026 · 13 technologies across 10 categories
Analytics
Google Analytics
since Aug 2022
Microsoft Clarity
since May 2025
CDN
Google Cloud CDN
since May 2025
Databases
Firebase
since May 2025
Font scripts
Google Font API
since May 2025
IaaS
Google Cloud
since May 2025
JavaScript frameworks
Miscellaneous
HTTP/3
since May 2025
Open Graph
since Sep 2022
Page builders
STUDIO
since May 2025
Programming languages
Node.js
since May 2025
Tag managers
Google Tag Manager
since Aug 2022
Audience
- 50% phone
- 50% desktop
Japan
Countries where the site has Chrome traffic, strongest markets first.
Open Page Rank
2.31 / 10 · ranked #2,866,873 of all domains
10 referring domains · OpenPageRank
Core Web Vitals
| LCP | 1.9 s |
| CLS | 0 |
| TTFB | 500 ms |
Real user p75, Chrome UX Report, Jun 2026.
Page
- Language: Japanese
- CDN: Google
- Weight: 3.0 MB · 65 requests
- Structured data: JSON-LD, OpenGraph
Homepage as crawled by the HTTP Archive, Jul 2026.
Full technology history →
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Recent changes
- dropped Priority Hints May 2026
- dropped core-js Apr 2026
- dropped Font Awesome Apr 2026
- dropped Google Cloud Trace Apr 2026
- dropped Google Maps Apr 2026
- detected Priority Hints Mar 2026
- detected Font Awesome Feb 2026
- detected Google Cloud Trace Feb 2026
- detected Google Maps Feb 2026