What powers 
n-seisen.co.jp?
Last seen Sep 2026 · 8 technologies across 6 categories
CDN
jsDelivr
since Apr 2024
JavaScript libraries
Miscellaneous
Open Graph
since Sep 2022
Programming languages
PHP
since Sep 2021
Web frameworks
CodeIgniter
since Sep 2021
Web servers
Apache HTTP Server
since Jan 2019
AI Crawlers
robots.txt could not be read at the last check (Oct 2026), so its policy is unknown.
- robots.txt not checked
- llms.txt not checked
- ai.txt not checked
AI Crawlers
Policy unknown
Audience
- 60% desktop
- 41% phone
Japan
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
3.74 / 10 · ranked #745,324 of all domains
39 referring domains · OpenPageRank
Core Web Vitals
| LCP | 0.8 s |
| INP | 50 ms |
| CLS | 0 |
| TTFB | 300 ms |
Real user p75, Chrome UX Report, Aug 2026.
Page
- Language: Japanese
- Weight: 1.1 MB · 38 requests
- Structured data: OpenGraph, Twitter Cards
Homepage as crawled by the HTTP Archive, Sep 2026.
Organisation
- Nippon Seisen
- Founded: 1951
- Country: Japan
From Wikidata (CC0).
Infrastructure
- DNS: d-53.info
- Email: securemx.jp
- Email security: SPF (hard fail), no DMARC record, DNSSEC signed
- SSL: JPRS, RSA 2048, expires Nov 2026
- Common Crawl link graph: rank 8,882,060
- Verified with: Microsoft 365
DNS records as swept Sep 2026, certificate as seen Sep 2026. How the web is hosted