What powers a21.jp?
Last seen Jun 2026 · 21 technologies across 16 categories
Advertising
Google AdSense
since Aug 2024
Affiliate programs
Moshimo
since Sep 2022
ValueCommerce
since May 2024
Analytics
Google Analytics
since Apr 2022
Quantcast Measure
since Apr 2022
CDN
jsDelivr
since Apr 2022
CMS
WordPress
since Apr 2022
Cookie compliance
Funding Choices
since Aug 2024
Databases
MySQL
since Apr 2022
Font scripts
Font Awesome
since Apr 2022
Google Font API
since Apr 2022
Hosting
Xserver
since Aug 2022
JavaScript libraries
Miscellaneous
Open Graph
since Sep 2022
RSS
since Dec 2022
Performance
Priority Hints
since May 2024
Programming languages
PHP
since Apr 2022
Security
reCAPTCHA
since Aug 2024
Tag managers
Google Tag Manager
since Apr 2022
Web servers
Nginx
since Apr 2022
Audience
Japan
Countries where the site has Chrome traffic, strongest markets first.
Open Page Rank
0.94 / 10 · ranked #13,892,131 of all domains
1 referring domains · OpenPageRank
Core Web Vitals
| LCP | 1.2 s |
| INP | 75 ms |
| CLS | 0.1 |
| TTFB | 500 ms |
Real user p75, Chrome UX Report, Jun 2026.
Page
- Language: Japanese
- Weight: 1.8 MB · 121 requests
- WordPress theme: cocoon-master (child: cocoon-child-master) · all themes
- Structured data: Microdata, OpenGraph, Twitter Cards
Homepage as crawled by the HTTP Archive, Jul 2026.
Full technology history →
Report an incorrect detection
Recent changes
- dropped cdnjs Jun 2026
- dropped Cloudflare Jun 2026
- dropped Google Hosted Libraries Feb 2026
- dropped Snowplow Analytics Oct 2025
- detected Snowplow Analytics Aug 2025