What powers 
kutsuwa.co.jp?
Last seen Sep 2026 · 23 technologies across 14 categories
Analytics
CDN
CMS
Databases
Font scripts
JavaScript libraries
Miscellaneous
Page builders
Performance
Programming languages
Security
Web servers
Widgets
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 Oct 2026.
- robots.txt found
- llms.txt found
- ai.txt not checked
AI Crawlers
No AI crawlers blocked
Standards: llms.txt
Audience
- 78% phone
- 21% desktop
- 2% tablet
Japan
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
4.69 / 10 · ranked #365,604 of all domains
78 referring domains · OpenPageRank
Core Web Vitals
| LCP | 0.7 s |
| INP | 75 ms |
| CLS | 0 |
| TTFB | 300 ms |
Real user p75, Chrome UX Report, Sep 2026.
Page
- Language: Japanese
- Weight: 2.5 MB · 112 requests
- WordPress theme: rindo-package (child: kutsuwa-theme) · all themes
- Structured data: JSON-LD, OpenGraph, Twitter Cards
Homepage as crawled by the HTTP Archive, Sep 2026.
Organisation
- Kutsuwa
- Founded: 1935
- Country: Japan
From Wikidata (CC0).
Infrastructure
- Hosted on Xserver (85.131.209.138)
- DNS: canonet.ne.jp
- Email: kutsuwa.co.jp
- Email security: SPF (soft fail), no DMARC record
- SSL: Let's Encrypt, RSA 2048, expires Dec 2026
- Common Crawl link graph: rank 2,745,903, 2 hosts
DNS records as swept Oct 2026, certificate as seen Oct 2026. How the web is hosted
Full technology history →
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Recent changes
- dropped Apache HTTP Server Nov 2025
- dropped cdnjs Nov 2025
- dropped CentOS Nov 2025
- dropped Cloudflare Nov 2025
- dropped Facebook Login Nov 2025
- dropped Google Hosted Libraries Nov 2025
- dropped HSTS Nov 2025
- dropped Ivory Search Nov 2025
- dropped OpenSSL Nov 2025
- dropped Slick Nov 2025
- dropped Twenty Seventeen Nov 2025