What powers 500021.jp?
Last seen Jun 2026 · 14 technologies across 10 categories
Analytics
Google Analytics
since Apr 2023
CDN
Hosting
Sakura Internet
since Dec 2025
JavaScript libraries
Maps
Google Maps
since Apr 2023
Operating systems
Windows Server
since Apr 2023
Programming languages
PHP
since Apr 2023
Security
HSTS
since Oct 2024
Web frameworks
CodeIgniter
since Apr 2023
Web servers
Audience
Japan
Countries where the site has Chrome traffic, strongest markets first.
Open Page Rank
1.84 / 10 · ranked #4,125,649 of all domains
4 referring domains · OpenPageRank
Core Web Vitals
| LCP | 1.2 s |
| INP | 50 ms |
| CLS | 0 |
| TTFB | 400 ms |
Real user p75, Chrome UX Report, Jun 2026.
Page
- Language: Japanese
- Weight: 5.6 MB · 134 requests
- Structured data: JSON-LD
Homepage as crawled by the HTTP Archive, Jul 2026.
Full technology history →
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Recent changes
- detected Sakura Internet Dec 2025