What powers 
katsuo.co.jp?
Last seen Sep 2026 · 9 technologies across 8 categories
CMS
Databases
Hosting
JavaScript libraries
Miscellaneous
Programming languages
Web servers
WordPress plugins
AI Crawlers
Doesn't name any of the 33 AI crawlers we track in its robots.txt. Catch-all rules (User-agent: *) restrict some paths for every crawler, AI or not. Checked Oct 2026.
- robots.txt found
- llms.txt not found
- ai.txt not found
AI Crawlers
No AI crawlers blocked
Audience
- 63% phone
- 37% desktop
Japan
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
3.57 / 10 · ranked #832,063 of all domains
33 referring domains · OpenPageRank
Core Web Vitals
| LCP | 1.9 s |
| INP | 75 ms |
| CLS | 0 |
| TTFB | 500 ms |
Real user p75, Chrome UX Report, Sep 2026.
Page
- Language: Japanese
- Weight: 18.1 MB · 79 requests
- Structured data: OpenGraph, Twitter Cards
Homepage as crawled by the HTTP Archive, Sep 2026.
Infrastructure
- Hosted on Xserver (157.112.183.64)
- DNS: Xserver
- Email: katsuo.co.jp
- Email security: SPF (soft fail), no DMARC record
- SSL: Let's Encrypt, RSA 2048, expires Dec 2026
- Common Crawl link graph: rank 9,524,345, 3 hosts
DNS records as swept Oct 2026, certificate as seen Oct 2026. How the web is hosted
Full technology history →
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