What powers seibii.co.jp?
Last seen Jun 2026 · 39 technologies across 20 categories
Advertising
Analytics
Cloudflare Browser Insights
since Jan 2025
Google Ads Conversion Tracking
since Jul 2021
Google Analytics
since Feb 2020
HubSpot Analytics
since Sep 2023
Matomo Analytics
since Sep 2023
Microsoft Clarity
since May 2021
CDN
Amazon CloudFront
since Feb 2020
Cloudflare
since Feb 2020
CMS
Contentful
since Nov 2022
Customer data platform
Segment
since Feb 2020
Issue trackers
JavaScript frameworks
React
since Feb 2022
JavaScript libraries
Marketing automation
HubSpot
since Sep 2023
Salesforce Marketing Cloud Account Engagement
since Dec 2022
Miscellaneous
PaaS
Amazon Web Services
since Feb 2020
Programming languages
Ruby
since Feb 2020
Security
Cloudflare Bot Management
since Sep 2023
HSTS
since Sep 2022
Static site generator
Astro
since Mar 2025
Tag managers
Google Tag Manager
since Feb 2020
UI frameworks
Web frameworks
Remix
since Apr 2023
Ruby on Rails
since Feb 2020
Web servers
Nginx
since Dec 2020
Webmail
Google Workspace
since Sep 2022
Widgets
Facebook
since Feb 2020
Audience
- 81% phone
- 17% desktop
- 1% tablet
Japan
Countries where the site has Chrome traffic, strongest markets first.
Open Page Rank
4.73 / 10 · ranked #291,048 of all domains
53 referring domains · OpenPageRank
Core Web Vitals
| LCP | 1.7 s |
| INP | 150 ms |
| CLS | 0.1 |
| TTFB | 700 ms |
Real user p75, Chrome UX Report, Jun 2026.
Page
- Language: Japanese
- CDN: Cloudflare
- Weight: 3.1 MB · 343 requests
- Structured data: OpenGraph, Twitter Cards
Homepage as crawled by the HTTP Archive, Jul 2026.
Subdomains
| Host | Techs |
|---|---|
| seibii.co.jp | 23 |
| career.seibii.co.jp | 11 |
| app.seibii.co.jp | 10 |
| app-schedule.seibii.co.jp | 7 |
| blog.seibii.co.jp | 7 |
| mecha-manual.seibii.co.jp | 7 |
| help.seibii.co.jp | 6 |
Full technology history →
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Recent changes
- detected HTTP/3 Oct 2025