What powers 841.co.jp?
Last seen Jun 2026 · 17 technologies across 11 categories
Analytics
Google Analytics
since Aug 2024
CDN
Google Hosted Libraries
since Jun 2026
jsDelivr
since Aug 2024
CMS
Databases
MySQL
since Aug 2024
Font scripts
Google Font API
since Jun 2026
Twitter Emoji (Twemoji)
since Dec 2025
JavaScript libraries
Miscellaneous
Open Graph
since Aug 2024
RSS
since Aug 2024
Programming languages
UI frameworks
Bootstrap
since Aug 2024
Web servers
Apache HTTP Server
since Aug 2024
WordPress plugins
TablePress
since Aug 2024
Audience
Japan
Countries where the site has Chrome traffic, strongest markets first.
Open Page Rank
1.08 / 10 · ranked #11,333,732 of all domains
1 referring domains · OpenPageRank
Core Web Vitals
| LCP | 1.1 s |
| INP | 25 ms |
| CLS | 0 |
| TTFB | 700 ms |
Real user p75, Chrome UX Report, Jun 2026.
Page
- Language: Japanese
- Weight: 10.3 MB · 65 requests
- Structured data: OpenGraph, Twitter Cards
Homepage as crawled by the HTTP Archive, Jul 2026.
Full technology history →
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Recent changes
- detected Google Font API Jun 2026
- detected Google Hosted Libraries Jun 2026
- detected jQuery Jun 2026
- detected Slick Jun 2026
- detected Twitter Emoji (Twemoji) Dec 2025