What powers firstseikotsuin.com?
Last seen Oct 2026 · 24 technologies across 18 categories
Advertising
Analytics
CDN
CMS
Databases
Font scripts
JavaScript libraries
Maps
Miscellaneous
Page builders
Performance
Programming languages
Security
Tag managers
Video players
Web servers
Webmail
Widgets
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
- Oct 2026 robots.txt appeared
- Oct 2026 * added to robots.txt
AI Crawlers
No AI crawlers blocked
Audience
Japan
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
0.40 / 10 · ranked #36,296,313 of all domains
2 referring domains · OpenPageRank
Core Web Vitals
| LCP | 2.2 s |
| INP | 50 ms |
| CLS | 0 |
| TTFB | 1100 ms |
Real user p75, Chrome UX Report, Sep 2026.
Page
- Language: Japanese
- Weight: 3.1 MB · 66 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 (157.7.107.70)
- DNS: Muumuu Domain
- Email: Lolipop
- Email security: no SPF record, no DMARC record
- SSL: Let's Encrypt, RSA 2048, expires Dec 2026
- Common Crawl link graph: rank 28,263,423
- Verified with: Apple Business
DNS records as swept Oct 2026, certificate as seen Oct 2026. How the web is hosted
Full technology history →
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Recent changes
- dropped core-js Oct 2026
- dropped Facebook Pixel Oct 2026
- detected jQuery Migrate Oct 2026
- detected Lozad.js Oct 2026
- dropped Microsoft Clarity Oct 2026
- detected MySQL Oct 2026
- detected Open Graph Oct 2026
- detected PHP Oct 2026
- detected Priority Hints Oct 2026
- detected RSS Oct 2026
- detected WordPress Oct 2026
- detected WordPress Block Editor Oct 2026
- detected Cloudflare Bot Management May 2026