What powers seibunsya.co.jp?
Last seen Oct 2026 · 22 technologies across 13 categories
Analytics
Google Analytics
since Apr 2019
CDN
CMS
WordPress
since Apr 2019
Databases
MySQL
since Apr 2019
Font scripts
JavaScript frameworks
JavaScript libraries
Miscellaneous
Open Graph
since Sep 2022
RSS
since Dec 2022
Programming languages
PHP
since Apr 2019
Security
HSTS
since Oct 2026
Tag managers
Google Tag Manager
since Apr 2019
Web servers
Apache HTTP Server
since Jan 2019
WordPress plugins
Smart Slider 3
since Feb 2022
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
- 54% phone
- 46% desktop
Japan
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
1.91 / 10 · ranked #3,837,730 of all domains
6 referring domains · OpenPageRank
Core Web Vitals
| LCP | 2.8 s |
| INP | 50 ms |
| CLS | 0 |
| TTFB | 300 ms |
Real user p75, Chrome UX Report, Sep 2026.
Page
- Language: Japanese
- Weight: 37.2 MB · 86 requests
- Structured data: OpenGraph
Homepage as crawled by the HTTP Archive, Oct 2026.
Infrastructure
- Hosted on Sakura Internet (160.16.152.228)
- DNS: secure-cms.net
- Email: Sakura Internet
- Email security: SPF (soft fail), DMARC monitor only
- SSL: Let's Encrypt, RSA 2048, expires Nov 2026
- Common Crawl link graph: rank 11,568,850, 2 hosts
DNS records as swept Oct 2026, certificate as seen Oct 2026. How the web is hosted
Subdomains
| Host | Techs |
|---|---|
| seibunsya.co.jp | 21 |
| www.seibunsya.co.jp | 10 |