What powers otpn.jp?
Last seen Aug 2026 · 10 technologies across 8 categories
A/B Testing
Google Optimize
since Mar 2022
Advertising
Google AdSense
since Nov 2022
Analytics
Google Analytics
since Aug 2018
Microsoft Clarity
since Nov 2022
CDN
Amazon CloudFront
since Jun 2021
Amazon S3
since Jun 2021
PaaS
Amazon Web Services
since Jun 2021
Security
reCAPTCHA
since Nov 2022
Tag managers
Google Tag Manager
since Aug 2018
Webmail
Google Workspace
since May 2023
AI Crawlers
robots.txt could not be read at the last check (Sep 2026), so its policy is unknown.
- robots.txt not checked
- llms.txt not checked
- ai.txt not checked
AI Crawlers
Policy unknown
Audience
- 97% phone
- 3% desktop
Japan
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
2.93 / 10 · ranked #1,723,195 of all domains
22 referring domains · OpenPageRank
Core Web Vitals
| LCP | 1.2 s |
| INP | 125 ms |
| CLS | 0 |
| TTFB | 300 ms |
Real user p75, Chrome UX Report, Aug 2026.
Page
- Language: Japanese
- CDN: Amazon CloudFront
- Weight: 2.0 MB · 49 requests
Homepage as crawled by the HTTP Archive, Sep 2026.
Infrastructure
- Hosted on Amazon Web Services (18.173.132.8)
- Email: Google Workspace
- Email security: SPF (soft fail), no DMARC record
- SSL: Amazon Trust Services, RSA 2048, expires Jan 2027
- Common Crawl link graph: rank 11,331,097, 2 hosts
- Verified with: Google
DNS records as swept Sep 2026, certificate as seen Sep 2026. How the web is hosted
Full technology history →
Report an incorrect detection
Recent changes
- detected Google AdSense Jul 2026
- detected Microsoft Clarity Jul 2026
- detected reCAPTCHA Jul 2026
- dropped Google AdSense Oct 2025
- dropped Microsoft Clarity Oct 2025
- dropped reCAPTCHA Oct 2025