What powers arc.ac.jp?
Last seen Jun 2026 · 18 technologies across 14 categories
Analytics
Umami
since Nov 2024
CMS
Databases
MySQL
since Apr 2019
Amazon SES
since May 2026
Font scripts
Hosting
Sakura Internet
since Jan 2025
JavaScript libraries
Miscellaneous
RSS
since Dec 2022
PaaS
Amazon Web Services
since May 2026
Performance
Priority Hints
since Oct 2024
Programming languages
PHP
since Apr 2019
Security
Cloudflare Turnstile
since Sep 2025
HSTS
since Dec 2025
Web servers
Nginx
since Oct 2024
WordPress plugins
Audience
- 51% phone
- 47% desktop
- 1% tablet
Japan
Taiwan
Countries where the site has Chrome traffic, strongest markets first.
Open Page Rank
2.89 / 10 · ranked #1,799,792 of all domains
17 referring domains · OpenPageRank
Core Web Vitals
| LCP | 3.1 s |
| INP | 50 ms |
| CLS | 0 |
| TTFB | 2100 ms |
Real user p75, Chrome UX Report, Jun 2026.
Page
- Language: Japanese
- Weight: 1.7 MB · 43 requests
- WordPress theme: ultimate-pro (child: ultimate-tokyo-child) · all themes
Homepage as crawled by the HTTP Archive, Jul 2026.
Subdomains
| Host | Techs |
|---|---|
| arc.ac.jp | 18 |
| www.arc.ac.jp | 14 |
Full technology history →
Report an incorrect detection
Recent changes
- detected Amazon SES May 2026
- detected Amazon Web Services May 2026
- detected Twitter Emoji (Twemoji) Jan 2026
- detected Cloudflare Turnstile Sep 2025