What powers vertebra.jp?
Last seen Sep 2026 · 23 technologies across 14 categories
Advertising
Analytics
CMS
Databases
Font scripts
Hosting
JavaScript frameworks
JavaScript libraries
Marketing automation
Miscellaneous
Programming languages
SEO
Tag managers
Web servers
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
- 80% desktop
- 20% phone
Japan
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
3.19 / 10 · ranked #1,283,996 of all domains
20 referring domains · OpenPageRank
Core Web Vitals
| LCP | 2.5 s |
| INP | 100 ms |
| CLS | 0.8 |
| TTFB | 400 ms |
Real user p75, Chrome UX Report, Sep 2026.
Page
- Language: Japanese
- Weight: 47.4 MB · 139 requests
- WordPress theme: vertebra · all themes
- Structured data: JSON-LD, OpenGraph, Twitter Cards
Homepage as crawled by the HTTP Archive, Oct 2026.
Infrastructure
- Hosted on Sakura Internet (49.212.207.187)
- Email: vertebra.jp
- Email security: SPF (soft fail), no DMARC record
- SSL: Let's Encrypt, RSA 2048, expires Dec 2026
- Common Crawl link graph: rank 10,452,295, 2 hosts
DNS records as swept Sep 2026, certificate as seen Oct 2026. How the web is hosted
Full technology history →
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Recent changes
- detected Tapad Jul 2026
- detected Twitter Emoji (Twemoji) Jul 2026
- dropped Tapad Jun 2026
- detected Tapad Mar 2026
- dropped Tapad Feb 2026