What powers karuta.or.jp?
Last seen Jun 2026 · 26 technologies across 18 categories
Advertising
Twitter Ads
since Feb 2023
Analytics
Google Analytics
since Jan 2019
CDN
Cloudflare
since Mar 2025
CMS
WordPress
since Jan 2022
Databases
MySQL
since Jan 2022
JavaScript frameworks
JavaScript libraries
Miscellaneous
Open Graph
since Sep 2022
Performance
Priority Hints
since Dec 2025
Programming languages
Security
Cloudflare Bot Management
since Mar 2025
Tag managers
Google Tag Manager
since Jan 2019
Video players
YouTube
since Jan 2022
Web frameworks
Ruby on Rails
since Jan 2019
Web server extensions
Web servers
Widgets
Twitter
since Feb 2023
WordPress plugins
TablePress
since Feb 2022
Audience
- 78% phone
- 20% desktop
- 1% tablet
Japan
Countries where the site has Chrome traffic, strongest markets first.
Open Page Rank
4.69 / 10 · ranked #351,779 of all domains
51 referring domains · OpenPageRank
Core Web Vitals
| LCP | 1.1 s |
| INP | 75 ms |
| CLS | 0 |
| TTFB | 400 ms |
Real user p75, Chrome UX Report, Jun 2026.
Page
- Language: Japanese
- Weight: 12.0 MB · 163 requests
- Structured data: OpenGraph
Homepage as crawled by the HTTP Archive, Jul 2026.
Subdomains
| Host | Techs |
|---|---|
| www.karuta.or.jp | 18 |
| cats.karuta.or.jp | 10 |
Full technology history →
Report an incorrect detection
Recent changes
- detected Cloudflare May 2026
- detected Cloudflare Bot Management May 2026
- detected Priority Hints Dec 2025
- dropped Cloudflare Nov 2025
- dropped Cloudflare Bot Management Nov 2025
- dropped core-js Sep 2025
- detected Download Monitor Aug 2025
- detected jQuery Migrate Aug 2025