What powers 
kk-osk.co.jp?
Last seen Sep 2026 · 15 technologies across 10 categories
Advertising
Analytics
CDN
Font scripts
JavaScript libraries
Miscellaneous
Operating systems
Tag managers
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 Oct 2026.
- robots.txt found
- llms.txt not found
- ai.txt not found
AI Crawlers
No AI crawlers blocked
Audience
- 67% phone
- 33% desktop
Japan
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
4.71 / 10 · ranked #308,244 of all domains
80 referring domains · OpenPageRank
Core Web Vitals
| LCP | 1.4 s |
| INP | 50 ms |
| CLS | 0.05 |
| TTFB | 300 ms |
Real user p75, Chrome UX Report, Sep 2026.
Page
- Language: Japanese
- Weight: 7.2 MB · 175 requests
- Structured data: JSON-LD, OpenGraph
Homepage as crawled by the HTTP Archive, Oct 2026.
Organisation
- 株式会社ＯＳＫ
- Profiles: YouTube
From the homepage's own structured data (Oct 2026).
Infrastructure
- DNS: Onamae.com
- Email: Microsoft 365
- Email security: SPF (soft fail), DMARC monitor only
- SSL: DigiCert, RSA 2048, expires Mar 2027
- Common Crawl link graph: rank 10,421,421, 2 hosts
- Verified with: Apple Business, Microsoft 365, OpenAI
DNS records as swept Oct 2026, certificate as seen Oct 2026. How the web is hosted