What powers wkf.jp?
Last seen Jun 2026 · 15 technologies across 13 categories
Advertising
Google AdSense
since May 2021
Affiliate programs
A8.net
since Feb 2021
Analytics
Google Analytics
since Jan 2019
CDN
Google Hosted Libraries
since Feb 2022
Hosting
Sakura Internet
since Aug 2022
JavaScript frameworks
JavaScript libraries
Maps
Google Maps
since Dec 2022
Programming languages
Security
reCAPTCHA
since Apr 2022
Tag managers
Google Tag Manager
since Jan 2019
Video players
YouTube
since Apr 2019
Web servers
Nginx
since Jan 2019
Audience
- 76% phone
- 24% desktop
Japan
Countries where the site has Chrome traffic, strongest markets first.
Open Page Rank
2.99 / 10 · ranked #1,609,861 of all domains
16 referring domains · OpenPageRank
Core Web Vitals
| LCP | 1.2 s |
| CLS | 0 |
Real user p75, Chrome UX Report, Jun 2026.
Page
- Language: Japanese
- Weight: 3.2 MB · 58 requests
Homepage as crawled by the HTTP Archive, Jul 2026.
Subdomains
| Host | Techs |
|---|---|
| kanagawa.wkf.jp | 11 |
| tokyo.wkf.jp | 11 |
| wkf.jp | 11 |
| www.wkf.jp | 11 |
| jkf-hs.wkf.jp | 10 |
| gojukai.wkf.jp | 9 |
| jikf.wkf.jp | 8 |
| kyotofu.wkf.jp | 8 |
| ejbkf.wkf.jp | 7 |
| jkpa.wkf.jp | 7 |
| kawasaki.wkf.jp | 7 |
| yokohama.wkf.jp | 7 |
| yokosuka.wkf.jp | 7 |
| nichidai.wkf.jp | 6 |
| kyoto.wkf.jp | 5 |
Full technology history →
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Recent changes
- dropped Slimbox Mar 2026