What powers kumon.co.jp?
Last seen Jun 2026 · 41 technologies across 17 categories
Analytics
Google Analytics
since Jan 2019
CDN
Amazon CloudFront
since May 2025
Amazon S3
since May 2025
cdnjs
since Nov 2023
Cloudflare
since Nov 2023
jQuery CDN
since Nov 2023
jsDelivr
since Nov 2023
Amazon SES
since Aug 2022
Font scripts
Font Awesome
since Jan 2019
Google Font API
since Jan 2019
JavaScript frameworks
JavaScript libraries
Miscellaneous
Mobile frameworks
Operating systems
Red Hat
since Nov 2023
PaaS
Amazon Web Services
since Aug 2022
Programming languages
Security
Tag managers
Google Tag Manager
since Jul 2022
UI frameworks
Web frameworks
Ruby on Rails
since Nov 2023
Web server extensions
Web servers
Apache HTTP Server
since Jan 2019
Nginx
since Nov 2023
Audience
- 52% desktop
- 46% phone
- 2% tablet
Japan
Countries where the site has Chrome traffic, strongest markets first.
Open Page Rank
2.38 / 10 · ranked #2,716,092 of all domains
6 referring domains · OpenPageRank
Core Web Vitals
| LCP | 1.4 s |
| INP | 50 ms |
| CLS | 0 |
| TTFB | 500 ms |
Real user p75, Chrome UX Report, Jun 2026.
Page
- Weight: 1.1 MB · 36 requests
Homepage as crawled by the HTTP Archive, Jul 2026.
Subdomains
| Host | Techs |
|---|---|
| brain-training.kumon.co.jp | 12 |
| knowledge.kumon.co.jp | 10 |
| assist.kyouka.kumon.co.jp | 9 |
| faq.brain-training.kumon.co.jp | 9 |
| inst.webentry.kumon.co.jp | 8 |
| assist-k-hiragana2.kyouka.kumon.co.jp | 7 |
| assist-k-hiragana3.kyouka.kumon.co.jp | 7 |
| assist-m-kuku2.kyouka.kumon.co.jp | 7 |
| frger.kumon.co.jp | 7 |
| assist-e-eigo.kyouka.kumon.co.jp | 6 |
| assist-k-hiragana1.kyouka.kumon.co.jp | 6 |
| assist-m-kuku.kyouka.kumon.co.jp | 6 |
| hojin.kumon.co.jp | 6 |
| assist-m-kazu.kyouka.kumon.co.jp | 5 |
| webkaikeisoft.kumon.co.jp | 3 |