What powers 
nigawa.ac.jp?
Last seen Sep 2026 · 13 technologies across 10 categories
CMS
WordPress
since Jan 2025
Databases
MySQL
since Jan 2025
Font scripts
Google Font API
since Jan 2025
JavaScript libraries
Miscellaneous
Open Graph
since Jan 2025
Performance
LazySizes
since Jan 2025
Programming languages
PHP
since Jan 2025
Web servers
Apache HTTP Server
since Jan 2019
Webmail
Apple iCloud Mail
since Jan 2023
WordPress plugins
AI Crawlers
Doesn't mention any of the 33 AI crawlers we track in its robots.txt; all are allowed by default. Checked Oct 2026.
- robots.txt found
- llms.txt not found
- ai.txt not found
AI Crawlers
No AI crawlers blocked
Audience
- 87% phone
- 13% desktop
Japan
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
3.57 / 10 · ranked #832,651 of all domains
41 referring domains · OpenPageRank
Core Web Vitals
| LCP | 1.1 s |
| INP | 50 ms |
| CLS | 0 |
| TTFB | 800 ms |
Real user p75, Chrome UX Report, Aug 2026.
Page
- Language: Japanese
- Weight: 1.5 MB · 26 requests
- Structured data: JSON-LD, OpenGraph, Twitter Cards
Homepage as crawled by the HTTP Archive, Sep 2026.
Infrastructure
- Hosted on OPTAGE OPTAGE Inc. (121.83.250.61)
- DNS: oftech.co.jp
- Email: nigawa.ac.jp
- Email security: SPF (soft fail), no DMARC record
- SSL: GlobalSign, RSA 2048, expires Oct 2026
- Common Crawl link graph: rank 12,850,967, 2 hosts
- Verified with: Apple Business
DNS records as swept Oct 2026, certificate as seen Oct 2026. How the web is hosted