What powers kohseis.co.jp?
Last seen Aug 2026 · 9 technologies across 7 categories
Analytics
CDN
Unpkg
since Jul 2021
Font scripts
Google Font API
since Feb 2020
JavaScript libraries
Miscellaneous
Open Graph
since Sep 2022
Programming languages
Web servers
Apache HTTP Server
since Jan 2019
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
- 86% phone
- 14% desktop
Japan
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
3.21 / 10 · ranked #1,256,659 of all domains
25 referring domains · OpenPageRank
Core Web Vitals
| LCP | 1.3 s |
| INP | 75 ms |
| CLS | 0 |
| TTFB | 400 ms |
Real user p75, Chrome UX Report, Aug 2026.
Page
- Language: Japanese
- Weight: 13.0 MB · 76 requests
- Structured data: OpenGraph
Homepage as crawled by the HTTP Archive, Sep 2026.
Infrastructure
- Hosted on MIRAI Mirai Communication Network Inc. (210.172.210.72)
- DNS: mirai.ad.jp
- Email: kohseis.co.jp
- Email security: no SPF record, DMARC monitor only
- SSL: Let's Encrypt, RSA 4096, expires Dec 2026
- Common Crawl link graph: rank 11,081,544, 2 hosts
DNS records as swept Aug 2026, certificate as seen Sep 2026. How the web is hosted
Subdomains
| Host | Techs |
|---|---|
| kohseis.co.jp | 9 |
| www.kohseis.co.jp | 9 |