What powers 
j-eng.co.jp?
Last seen Aug 2026 · 15 technologies across 11 categories
Analytics
Google Analytics
since Jul 2019
CDN
Google Hosted Libraries
since Feb 2022
CRM
Salesforce
since May 2026
Hosting panels
Plesk
since Dec 2019
JavaScript frameworks
GSAP
since May 2022
JavaScript libraries
Miscellaneous
Open Graph
since Sep 2022
Tag managers
Google Tag Manager
since Dec 2019
UI frameworks
Bootstrap
since Feb 2021
Video players
YouTube
since Apr 2021
Web servers
Apache HTTP Server
since Jul 2019
AI Crawlers
No robots.txt, so all AI crawlers are allowed by default. Checked Sep 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
3.91 / 10 · ranked #645,166 of all domains
47 referring domains · OpenPageRank
Core Web Vitals
| LCP | 1.1 s |
| INP | 100 ms |
| CLS | 0 |
| TTFB | 300 ms |
Real user p75, Chrome UX Report, Aug 2026.
Page
- Language: Japanese
- Weight: 5.2 MB · 60 requests
- Structured data: OpenGraph
Homepage as crawled by the HTTP Archive, Sep 2026.
Infrastructure
- Hosted on FUTURE Future Spirits Co.,Ltd. (219.99.173.163)
- DNS: secure.ne.jp
- Email: j-eng.co.jp
- Email security: SPF (soft fail), DMARC monitor only
- SSL: GlobalSign, RSA 2048, expires Jan 2027
- Common Crawl link graph: rank 8,217,119, 3 hosts
- Verified with: Microsoft 365
DNS records as swept Sep 2026, certificate as seen Sep 2026. How the web is hosted
Full technology history →
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Recent changes
- detected Salesforce May 2026