What powers seasideline.co.jp?
Last seen Aug 2026 · 10 technologies across 9 categories
Analytics
Google Analytics
since Jan 2019
CDN
Google Hosted Libraries
since Feb 2022
Font scripts
Google Font API
since Apr 2023
JavaScript libraries
Miscellaneous
PWA
since Apr 2023
Operating systems
CentOS
since Oct 2020
Web server extensions
Web servers
Webmail
Microsoft 365
since Aug 2022
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 Sep 2026.
- robots.txt found
- llms.txt not found
- ai.txt not found
AI Crawlers
No AI crawlers blocked
Audience
- 85% phone
- 13% desktop
- 1% tablet
Japan
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
4.75 / 10 · ranked #279,792 of all domains
90 referring domains · OpenPageRank
Core Web Vitals
| LCP | 1.2 s |
| INP | 50 ms |
| CLS | 0 |
| TTFB | 300 ms |
Real user p75, Chrome UX Report, Aug 2026.
Page
- Language: Japanese
- Weight: 8.4 MB · 103 requests
Homepage as crawled by the HTTP Archive, Sep 2026.
Organisation
- Yokohama Seaside Line
- Founded: 1983
- Sector: railway
- Country: Japan
From Wikidata (CC0).
Infrastructure
- DNS: ocn.ad.jp
- Email: Microsoft 365
- Email security: SPF (hard fail), no DMARC record
- SSL: GlobalSign, RSA 2048, expires Mar 2027
- Common Crawl link graph: rank 1,184,641, 2 hosts
- Verified with: Microsoft 365
DNS records as swept Sep 2026, certificate as seen Sep 2026. How the web is hosted