What powers 
difff.jp?
Last seen Dec 2024 · 5 technologies across 5 categories
Google Workspace
since Dec 2024
Operating systems
UNIX
since Aug 2018
Programming languages
Web server extensions
Web servers
AI Crawlers
No robots.txt, so all AI crawlers are allowed by default. Checked Oct 2026.
- robots.txt not found
- llms.txt not found
- ai.txt not found
AI Crawlers
No robots.txt, all AI crawlers allowed
Audience
- 100% desktop
Japan
China
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
4.82 / 10 · ranked #264,247 of all domains
40 referring domains · OpenPageRank
Core Web Vitals
| LCP | 0.4 s |
| INP | 50 ms |
| CLS | 0 |
| TTFB | 300 ms |
Real user p75, Chrome UX Report, Aug 2026.
Infrastructure
- Hosted on UTNET The University of Tokyo (133.11.32.71)
- DNS: Onamae.com
- Email: Google Workspace
- Email security: no SPF record, no DMARC record
- SSL: Let's Encrypt, ECDSA P256, expires Oct 2026
- Common Crawl link graph: rank 489,658, 3 hosts
DNS records as swept Sep 2026, certificate as seen Sep 2026. How the web is hosted