What powers 
books-ruhe.co.jp?
Last seen Sep 2026 · 7 technologies across 7 categories
Analytics
Google Analytics
since Dec 2020
Editors
DreamWeaver
since Jan 2019
JavaScript libraries
Choices
since Feb 2021
Operating systems
CentOS
since Jan 2019
Programming languages
Web server extensions
Web servers
Apache HTTP Server
since Jan 2019
AI Crawlers
No robots.txt, so all AI crawlers are allowed by default. Checked Sep 2026.
- robots.txt not found
- llms.txt not found
- ai.txt not found
AI Crawlers
No robots.txt, all AI crawlers allowed
Audience
- 73% phone
- 27% desktop
Japan
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
3.95 / 10 · ranked #612,348 of all domains
56 referring domains · OpenPageRank
Core Web Vitals
| LCP | 0.6 s |
| INP | 250 ms |
| CLS | 0 |
| TTFB | 300 ms |
Real user p75, Chrome UX Report, Aug 2026.
Page
- Language: Japanese
- Weight: 1.3 MB · 43 requests
Homepage as crawled by the HTTP Archive, Sep 2026.
Infrastructure
- Hosted on PROX Prox System Design Inc. (210.143.102.78)
- Email: no MX record returned
- Email security: SPF (hard fail), DMARC quarantine
- SSL: Let's Encrypt, RSA 2048, expires Nov 2026
- Common Crawl link graph: rank 738,597, 2 hosts
DNS records as swept Sep 2026, certificate as seen Sep 2026. How the web is hosted
Subdomains
| Host | Techs |
|---|---|
| books-ruhe.co.jp | 6 |
| www.books-ruhe.co.jp | 2 |
Full technology history →
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Recent changes
- dropped Twitter Feb 2026
- dropped Twitter Ads Feb 2026
- dropped Cloudflare Nov 2025
- dropped Cloudflare Bot Management Nov 2025