What powers isp21.co.jp?
Last seen Jun 2026 · 25 technologies across 15 categories
Analytics
Google Analytics
since Feb 2019
CDN
cdnjs
since Nov 2021
Cloudflare
since May 2022
Google Hosted Libraries
since Feb 2022
jsDelivr
since Sep 2023
Unpkg
since Sep 2025
CMS
Databases
MySQL
since Aug 2019
Font scripts
Twitter Emoji (Twemoji)
since Aug 2019
JavaScript libraries
Miscellaneous
Open Graph
since Sep 2022
RSS
since Dec 2022
PaaS
Amazon Web Services
since Aug 2022
Performance
Priority Hints
since Jul 2024
Programming languages
PHP
since Aug 2019
Security
reCAPTCHA
since Jan 2024
Video players
YouTube
since Sep 2025
Web servers
Nginx
since Feb 2019
Webmail
Google Workspace
since Aug 2022
WordPress plugins
Audience
- 81% desktop
- 19% phone
Japan
Countries where the site has Chrome traffic, strongest markets first.
Open Page Rank
2.47 / 10 · ranked #2,555,387 of all domains
13 referring domains · OpenPageRank
Core Web Vitals
| LCP | 2.3 s |
| INP | 50 ms |
| CLS | 0 |
| TTFB | 1100 ms |
Real user p75, Chrome UX Report, Jun 2026.
Page
- Language: Japanese
- Weight: 7.5 MB · 132 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 Twitter Emoji (Twemoji) Jan 2026
- dropped jQuery Migrate Oct 2025
- dropped MetaSlider Oct 2025
- detected Swiper Sep 2025
- detected Unpkg Sep 2025
- detected YouTube Sep 2025