What powers nantatsu.co.jp?
Last seen Sep 2026 · 21 technologies across 14 categories
Analytics
CDN
Font scripts
JavaScript frameworks
JavaScript libraries
Load balancers
Miscellaneous
Operating Systems
PaaS
Tag managers
Web Frameworks
Web server extensions
Web Servers
Webmail
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 Sep 2026.
- robots.txt found
- llms.txt not found
- ai.txt not found
AI Crawlers
No AI crawlers blocked
Audience
- 53% desktop
- 47% phone
Japan
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
3.32 / 10 · ranked #1,107,185 of all domains
29 referring domains · OpenPageRank
Core Web Vitals
| LCP | 0.7 s |
| INP | 50 ms |
| CLS | 0 |
| TTFB | 100 ms |
Real user p75, Chrome UX Report, Aug 2026.
Page
- Language: Japanese
- CDN: Amazon CloudFront
- Weight: 10.3 MB · 110 requests
- Structured data: OpenGraph
Homepage as crawled by the HTTP Archive, Sep 2026.
Organisation
- Nankai Tatsumura Construction
- Founded: 1944
- Country: Japan
From Wikidata (CC0).
Infrastructure
- DNS: Amazon Route 53
- Email: Microsoft 365
- Email security: SPF (soft fail), DMARC monitor only
- SSL: Amazon Trust Services, RSA 2048, expires Mar 2027
- Common Crawl link graph: rank 10,833,271
- Verified with: Box, Microsoft 365
DNS records as swept Sep 2026, certificate as seen Sep 2026. How the web is hosted
Subdomains
| Host | Techs |
|---|---|
| www.nantatsu.co.jp | 18 |
| starweb.nantatsu.co.jp | 3 |
Full technology history →
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Recent changes
- dropped anime.js Nov 2025
- dropped CodeIgniter Nov 2025
- dropped PHP Nov 2025