What powers pre21.jp?
Last seen Jun 2026 · 17 technologies across 11 categories
CDN
CMS
Databases
MySQL
since Jan 2019
Font scripts
Google Font API
since Jan 2019
Hosting
Xserver
since Aug 2022
JavaScript frameworks
JavaScript libraries
Swiper
since Apr 2024
Miscellaneous
Open Graph
since Jun 2023
Programming languages
PHP
since Jan 2019
Web servers
Nginx
since Sep 2024
WordPress plugins
WP-PageNavi
since Apr 2024
Audience
- 68% phone
- 32% desktop
Japan
Countries where the site has Chrome traffic, strongest markets first.
Open Page Rank
2.84 / 10 · ranked #1,897,454 of all domains
13 referring domains · OpenPageRank
Core Web Vitals
| LCP | 1.9 s |
| INP | 25 ms |
| CLS | 0 |
| TTFB | 400 ms |
Real user p75, Chrome UX Report, Jun 2026.
Page
- Language: Japanese
- Weight: 4.2 MB · 53 requests
- Structured data: OpenGraph
Homepage as crawled by the HTTP Archive, Jul 2026.