What powers f-keirin.jp?
Last seen Jun 2026 · 11 technologies across 7 categories
Advertising
Yahoo Advertising
since Apr 2022
CDN
Font scripts
Google Font API
since Oct 2025
JavaScript libraries
Miscellaneous
Open Graph
since Oct 2022
Video players
YouTube
since Oct 2022
Web servers
Apache HTTP Server
since Jan 2019
Audience
- 90% phone
- 10% desktop
Japan
Countries where the site has Chrome traffic, strongest markets first.
Open Page Rank
3.86 / 10 · ranked #687,552 of all domains
36 referring domains · OpenPageRank
Core Web Vitals
| LCP | 2 s |
| INP | 100 ms |
| CLS | 0.1 |
| TTFB | 500 ms |
Real user p75, Chrome UX Report, Jun 2026.
Page
- Language: Japanese
- Weight: 9.4 MB · 159 requests
- Structured data: OpenGraph, Twitter Cards
Homepage as crawled by the HTTP Archive, Jul 2026.
Full technology history →
Report an incorrect detection
Recent changes
- detected Yahoo Advertising Apr 2026
- dropped Day.js Mar 2026
- dropped jQuery CDN Mar 2026
- dropped Nginx Mar 2026
- dropped PHP Mar 2026
- dropped Polyfill Mar 2026
- dropped PWA Mar 2026
- detected Apache HTTP Server Feb 2026
- dropped cdnjs Nov 2025
- dropped Cloudflare Nov 2025
- dropped Cloudflare Bot Management Nov 2025
- dropped core-js Nov 2025
- dropped Facebook Login Nov 2025
- dropped FancyBox Nov 2025
- dropped Font Awesome Nov 2025
- dropped FullCalendar Nov 2025
- dropped Google Analytics Nov 2025
- dropped Swiper Nov 2025
- dropped Twitter Nov 2025
- dropped Twitter Ads Nov 2025
- dropped TypeScript Nov 2025
- dropped Yahoo Advertising Nov 2025
- detected Day.js Oct 2025
- detected Google Font API Oct 2025
- detected Google Hosted Libraries Oct 2025
- detected jQuery CDN Oct 2025
- detected Lozad.js Oct 2025
- detected Polyfill Oct 2025
- detected PWA Oct 2025
- detected Slick Oct 2025
- detected Unpkg Oct 2025