What powers koya-sys.com?
Last seen Sep 2026 · 12 technologies across 8 categories
Analytics
CDN
CMS
Hosting
JavaScript frameworks
JavaScript libraries
Miscellaneous
Security
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
- 57% phone
- 43% desktop
Japan
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
2.04 / 10 · ranked #3,470,532 of all domains
9 referring domains · OpenPageRank
Core Web Vitals
| LCP | 1.4 s |
| INP | 25 ms |
| CLS | 0 |
| TTFB | 700 ms |
Real user p75, Chrome UX Report, Aug 2026.
Page
- Language: Japanese (Japan)
- CDN: Cloudflare
- Weight: 1.4 MB · 55 requests
- Structured data: JSON-LD, Microdata, OpenGraph, Twitter Cards
Homepage as crawled by the HTTP Archive, Sep 2026.
Infrastructure
- Email: Sakura Internet
- Email security: SPF (soft fail), no DMARC record
- SSL: Google Trust Services, ECDSA P256, expires Oct 2026
- Common Crawl link graph: rank 222,728, 2 hosts
- Verified with: Google
DNS records as swept Sep 2026, certificate as seen Sep 2026. How the web is hosted
Full technology history →
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Recent changes
- detected Sakura Internet Jul 2026
- dropped Ahoy May 2026
- dropped POWR May 2026
- dropped Ruby May 2026
- dropped Ruby on Rails May 2026
- dropped Twitter May 2026
- dropped Twitter Ads May 2026
- dropped core-js Apr 2026
- dropped Nginx Dec 2025
- detected HTTP/3 Nov 2025