What powers re-ct.co.jp?
Last seen Oct 2026 · 18 technologies across 12 categories
Analytics
Google Analytics
since Oct 2024
Caching
Varnish
since Oct 2024
CDN
Amazon CloudFront
since Oct 2024
Fastly
since Oct 2024
Development
JavaScript frameworks
JavaScript libraries
Miscellaneous
Webpack
since Oct 2024
PaaS
Amazon Web Services
since Oct 2024
GitHub Pages
since Oct 2024
Performance
Priority Hints
since Oct 2024
Programming languages
Node.js
since Oct 2024
Tag managers
Google Tag Manager
since Oct 2024
UI frameworks
MUI
since Oct 2024
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
Japan
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
2.16 / 10 · ranked #3,181,016 of all domains
3 referring domains · OpenPageRank
Core Web Vitals
| LCP | 1.5 s |
| CLS | 0 |
| TTFB | 700 ms |
Real user p75, Chrome UX Report, Oct 2026.
Page
- Language: Japanese
- CDN: Amazon CloudFront
- Weight: 2.1 MB · 45 requests
Homepage as crawled by the HTTP Archive, Oct 2026.
Infrastructure
- Hosted on Amazon Web Services (13.249.96.20, IPv6)
- DNS: Amazon Route 53
- Email: Google Workspace
- Email security: no SPF record, no DMARC record
- SSL: Amazon Trust Services, RSA 2048, expires Feb 2027
- Common Crawl link graph: rank 11,862,871
- Verified with: Google
DNS records as swept Oct 2026, certificate as seen Oct 2026. How the web is hosted