What powers erjp.co.jp?
Last seen Sep 2026 · 20 technologies across 13 categories
Analytics
CMS
Databases
Font scripts
JavaScript libraries
Load balancers
Miscellaneous
PaaS
Performance
Programming languages
Security
Web servers
WordPress plugins
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 found
- ai.txt not found
AI Crawlers
No AI crawlers blocked
Standards: llms.txt
Audience
- 57% desktop
- 43% phone
Japan
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
2.89 / 10 · ranked #1,797,703 of all domains
15 referring domains · OpenPageRank
Core Web Vitals
| LCP | 1.8 s |
| CLS | 0.05 |
| TTFB | 1100 ms |
Real user p75, Chrome UX Report, Aug 2026.
Page
- Language: Japanese
- Weight: 6.8 MB · 90 requests
- Structured data: JSON-LD, OpenGraph, Twitter Cards
Homepage as crawled by the HTTP Archive, Sep 2026.
Organisation
- 株式会社イー・アール・ジャパン
From the homepage's own structured data (Sep 2026).
Infrastructure
- Hosted on Automattic (WordPress.com) (192.0.78.144)
- DNS: WordPress.com DNS
- Email: no MX record returned
- Email security: SPF (soft fail), DMARC monitor only
- SSL: Google Trust Services, ECDSA P256, expires Oct 2026
- Common Crawl link graph: rank 13,705,268, 2 hosts
- Verified with: Google
DNS records as swept Aug 2026, certificate as seen Sep 2026. How the web is hosted
Subdomains
| Host | Techs |
|---|---|
| erjp.co.jp | 17 |
| www.erjp.co.jp | 5 |
Full technology history →
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Recent changes
- dropped HTTP/3 Jul 2026
- detected Priority Hints Jun 2026
- dropped Jetpack Mar 2026
- detected Twitter Emoji (Twemoji) Dec 2025