What powers klas-ac.jp?
Last seen Jun 2026 · 21 technologies across 14 categories
Advertising
Analytics
Google Analytics
since May 2020
CDN
Cloudflare
since Oct 2021
Google Hosted Libraries
since Feb 2022
CMS
WordPress
since May 2020
Databases
MySQL
since May 2020
Font scripts
Google Font API
since May 2020
Hosting
Sakura Internet
since Aug 2022
JavaScript libraries
Programming languages
PHP
since May 2020
Security
Cloudflare Bot Management
since Oct 2021
reCAPTCHA
since Sep 2023
Segmentation
Adobe Audience Manager
since Apr 2022
Tag managers
Google Tag Manager
since May 2020
Video players
YouTube
since May 2020
Web servers
Nginx
since May 2020
Audience
- 55% phone
- 45% desktop
Japan
Countries where the site has Chrome traffic, strongest markets first.
Open Page Rank
2.76 / 10 · ranked #2,067,688 of all domains
9 referring domains · OpenPageRank
Core Web Vitals
| LCP | 1.3 s |
| INP | 100 ms |
| CLS | 0 |
| TTFB | 500 ms |
Real user p75, Chrome UX Report, Jun 2026.
Page
- Weight: 6.3 MB · 321 requests
- Structured data: JSON-LD
Homepage as crawled by the HTTP Archive, Jul 2026.
Full technology history →
Report an incorrect detection
Recent changes
- detected Cloudflare May 2026
- detected Cloudflare Bot Management May 2026
- dropped Cloudflare Nov 2025
- dropped Cloudflare Bot Management Nov 2025