What powers tsuru-con.co.jp?
Last seen Sep 2026 · 19 technologies across 15 categories
Analytics
Caching
CMS
Databases
JavaScript libraries
Miscellaneous
Page builders
Performance
Programming languages
UI frameworks
Video players
Web servers
Webmail
WordPress plugins
WordPress themes
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
- 65% desktop
- 35% phone
Japan
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
1.87 / 10 · ranked #3,995,119 of all domains
7 referring domains · OpenPageRank
Core Web Vitals
| LCP | 2.1 s |
| CLS | 0 |
| TTFB | 1600 ms |
Real user p75, Chrome UX Report, Sep 2026.
Page
- Language: Japanese
- Weight: 34.5 MB · 106 requests
- WordPress theme: lightning-pro (child: tsuru-con) · all themes
- Structured data: JSON-LD
Homepage as crawled by the HTTP Archive, Oct 2026.
Organisation
- 鶴見コンクリート株式会社 (Tsurumi Concrete Co., Ltd. (Japan) on Wikidata)
- Founded: 1949
- Country: Japan
From the homepage's own structured data (Oct 2026) and Wikidata (CC0).
Infrastructure
- Hosted on CPI-NET KDDI Web Communications Inc. (150.60.246.163)
- DNS: secure.ne.jp
- Email: Microsoft 365
- Email security: SPF (hard fail), no DMARC record
- SSL: JPRS, RSA 2048, expires Feb 2027
- Common Crawl link graph: rank 37,959,559, 2 hosts
- Verified with: Google, Microsoft 365
DNS records as swept Aug 2026, certificate as seen Oct 2026. How the web is hosted
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Recent changes
- detected Tailwind CSS Aug 2026