What powers chess-primer.jp?
Last seen Jun 2026 · 14 technologies across 12 categories
Advertising
Google AdSense
since Feb 2020
Analytics
Google Analytics
since Feb 2020
Cookie compliance
Funding Choices
since May 2024
Font scripts
Google Font API
since Nov 2025
JavaScript libraries
core-js
since Sep 2021
Miscellaneous
Open Graph
since Oct 2022
Operating systems
Fedora
since Feb 2020
Programming languages
Security
reCAPTCHA
since Apr 2022
Tag managers
Google Tag Manager
since Feb 2020
Web server extensions
Web servers
Audience
- 55% phone
- 44% desktop
- 2% tablet
Japan
Countries where the site has Chrome traffic, strongest markets first.
Open Page Rank
1.53 / 10 · ranked #6,281,934 of all domains
4 referring domains · OpenPageRank
Core Web Vitals
| LCP | 0.9 s |
| INP | 75 ms |
| CLS | 0.05 |
| TTFB | 300 ms |
Real user p75, Chrome UX Report, Jun 2026.
Page
- Language: Japanese
- Weight: 1.6 MB · 184 requests
- Structured data: JSON-LD, OpenGraph, Twitter Cards
Homepage as crawled by the HTTP Archive, Jul 2026.
Full technology history →
Report an incorrect detection
Recent changes
- detected Google Font API Feb 2026
- dropped Snowplow Analytics Feb 2026
- dropped Google Font API Jan 2026
- detected Snowplow Analytics Dec 2025
- detected Google Font API Nov 2025