What powers grader.co.jp?
Last seen Oct 2026 · 18 technologies across 13 categories
Affiliate programs
Analytics
CDN
CMS
Databases
Ecommerce
Font scripts
JavaScript libraries
Miscellaneous
Performance
Programming languages
Web servers
WordPress plugins
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
1.67 / 10 · ranked #5,171,860 of all domains
4 referring domains · OpenPageRank
Core Web Vitals
| LCP | 1.8 s |
| CLS | 0 |
| TTFB | 900 ms |
Real user p75, Chrome UX Report, Sep 2026.
Page
- Language: Japanese
- Weight: 6.6 MB · 93 requests
- WordPress theme: cocoon-master (child: cocoon-child-master) · all themes
- Structured data: JSON-LD, Microdata, OpenGraph, Twitter Cards
Homepage as crawled by the HTTP Archive, Oct 2026.
Infrastructure
- Hosted on GMO Internet (157.7.189.247)
- DNS: heteml.jp
- Email: hetemail.jp
- Email security: SPF (soft fail), DMARC monitor only
- SSL: Let's Encrypt, RSA 2048, expires Jan 2027
- Common Crawl link graph: rank 17,935,691, 2 hosts
DNS records as swept Oct 2026, certificate as seen Oct 2026. How the web is hosted
Subdomains
| Host | Techs |
|---|---|
| grader.co.jp | 18 |
| www.grader.co.jp | 3 |
Full technology history →
Report an incorrect detection
Recent changes
- dropped cdnjs May 2026
- dropped Cloudflare May 2026
- dropped Google Hosted Libraries Feb 2026
- detected Priority Hints Dec 2025