What powers 
kotsuzumi.co.jp?
Last seen Sep 2026 · 23 technologies across 14 categories
Analytics
CDN
CMS
Databases
Font scripts
Hosting
JavaScript libraries
Marketing automation
Miscellaneous
Programming languages
Rich text editors
UI frameworks
Web servers
WordPress plugins
AI Crawlers
Doesn't mention any of the 33 AI crawlers we track in its robots.txt; all are allowed by default. Checked Sep 2026.
- robots.txt found
- llms.txt not found
- ai.txt not found
AI Crawlers
No AI crawlers blocked
Audience
- 69% phone
- 31% desktop
Japan
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
4.49 / 10 · ranked #404,020 of all domains
78 referring domains · OpenPageRank
Core Web Vitals
| LCP | 1.7 s |
| INP | 75 ms |
| CLS | 0 |
| TTFB | 400 ms |
Real user p75, Chrome UX Report, Aug 2026.
Page
- Weight: 5.5 MB · 64 requests
- Structured data: JSON-LD, OpenGraph, Twitter Cards
Homepage as crawled by the HTTP Archive, Sep 2026.
Organisation
From the homepage's own structured data (Sep 2026).
Infrastructure
- Hosted on Xserver (202.233.67.11)
- DNS: Xserver
- Email: kotsuzumi.co.jp
- Email security: SPF (soft fail), no DMARC record
- SSL: Let's Encrypt, RSA 2048, expires Dec 2026
- Common Crawl link graph: rank 7,141,467, 2 hosts
- Verified with: Google
DNS records as swept Sep 2026, certificate as seen Sep 2026. How the web is hosted
Subdomains
| Host | Techs |
|---|---|
| kotsuzumi.co.jp | 18 |
| www.kotsuzumi.co.jp | 14 |
Full technology history →
Report an incorrect detection
Recent changes
- detected TinyMCE Nov 2025