What powers yu-sa.jp?
Last seen Oct 2026 · 13 technologies across 10 categories
CMS
Databases
MySQL
since Feb 2020
Font scripts
Google Font API
since Dec 2025
Hosting
Sakura Internet
since Aug 2022
JavaScript libraries
Miscellaneous
RSS
since Oct 2024
Programming languages
Web servers
Nginx
since Feb 2020
WordPress plugins
Contact Form 7
since Oct 2024
Smash Balloon Instagram Feed
since Oct 2024
WordPress themes
Lightning
since Oct 2024
AI Crawlers
No robots.txt, so all AI crawlers are allowed by default. Checked Nov 2026.
- robots.txt not found
- llms.txt not found
- ai.txt not found
AI Crawlers
No robots.txt, all AI crawlers allowed
Audience
- 86% phone
- 14% desktop
Japan
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
3.82 / 10 · ranked #708,127 of all domains
48 referring domains · OpenPageRank
Core Web Vitals
| LCP | 4.4 s |
| INP | 50 ms |
| CLS | 0 |
| TTFB | 2900 ms |
Real user p75, Chrome UX Report, Sep 2026.
Page
- Language: Japanese
- Weight: 3.5 MB · 139 requests
- WordPress theme: lightning (child: lightning-child) · all themes
Homepage as crawled by the HTTP Archive, Oct 2026.
Infrastructure
- Hosted on Sakura Internet (59.106.27.214)
- DNS: Sakura Internet
- Email: yu-sa.jp
- Email security: SPF (soft fail), no DMARC record
- SSL: Let's Encrypt, RSA 2048, expires Jan 2027
- Common Crawl link graph: rank 10,359,653
DNS records as swept Nov 2026, certificate as seen Nov 2026. How the web is hosted
Full technology history →
Report an incorrect detection
Recent changes
- dropped Swiper Sep 2026
- detected Swiper Jul 2026
- dropped Swiper May 2026
- detected Swiper Feb 2026
- detected Google Font API Dec 2025