What powers quaternary.jp?
Last seen Aug 2026 · 8 technologies across 8 categories
CDN
Unpkg
since Feb 2025
CMS
WordPress
since Feb 2025
Databases
MySQL
since Feb 2025
Font scripts
Google Font API
since Feb 2025
Hosting
Sakura Internet
since Aug 2022
JavaScript libraries
Swiper
since Feb 2025
Programming languages
PHP
since Feb 2025
Web servers
Nginx
since Feb 2019
AI Crawlers
No robots.txt, so all AI crawlers are allowed by default. Checked Sep 2026.
- robots.txt not found
- llms.txt not found
- ai.txt not found
AI Crawlers
No robots.txt, all AI crawlers allowed
Audience
- 70% desktop
- 30% phone
Japan
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
3.45 / 10 · ranked #952,705 of all domains
36 referring domains · OpenPageRank
Core Web Vitals
| LCP | 1.1 s |
| INP | 50 ms |
| CLS | 0 |
| TTFB | 300 ms |
Real user p75, Chrome UX Report, Aug 2026.
Page
- Language: Japanese
- Weight: 8.0 MB · 64 requests
Homepage as crawled by the HTTP Archive, Sep 2026.
Organisation
- Japan Association for Quaternary Research
- Country: Japan
From Wikidata (CC0).
Infrastructure
- Hosted on Sakura Internet (182.48.49.191)
- DNS: Sakura Internet
- Email: quaternary.jp
- Email security: SPF (soft fail), no DMARC record
- SSL: Let's Encrypt, RSA 2048, expires Nov 2026
- Common Crawl link graph: rank 1,261,911, 2 hosts
DNS records as swept Sep 2026, certificate as seen Sep 2026. How the web is hosted
Subdomains
| Host | Techs |
|---|---|
| quaternary.jp | 8 |
| www.quaternary.jp | 2 |