What powers books-online.jp?
Last seen Jun 2026 · 14 technologies across 9 categories
Advertising
Twitter Ads
since Jul 2021
CDN
Cloudflare
since Mar 2025
Font scripts
Font Awesome
since Jan 2019
JavaScript libraries
Miscellaneous
Open Graph
since Sep 2022
Mobile frameworks
jQuery-pjax
since May 2020
Security
Cloudflare Bot Management
since Mar 2025
HSTS
since Sep 2022
Web servers
Nginx
since May 2020
Widgets
Twitter
since Aug 2020
Audience
- 61% desktop
- 39% phone
Japan
Countries where the site has Chrome traffic, strongest markets first.
Open Page Rank
2.73 / 10 · ranked #2,117,152 of all domains
9 referring domains · OpenPageRank
Core Web Vitals
| LCP | 1.6 s |
| INP | 200 ms |
| CLS | 0.1 |
| TTFB | 500 ms |
Real user p75, Chrome UX Report, Jun 2026.
Page
- Language: Japanese
- Weight: 2.3 MB · 134 requests
- Structured data: OpenGraph
Homepage as crawled by the HTTP Archive, Jul 2026.
Full technology history →
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Recent changes
- detected Cloudflare May 2026
- detected Cloudflare Bot Management May 2026
- dropped Cloudflare Nov 2025
- dropped Cloudflare Bot Management Nov 2025