What powers j4u.co.jp?
Last seen Jun 2026 · 22 technologies across 13 categories
Analytics
Google Analytics
since Apr 2019
CDN
Cloudflare
since Jun 2019
Ecommerce
Cart Functionality
since Aug 2020
Shopify
since Apr 2019
JavaScript frameworks
JavaScript libraries
Marketing automation
Zotabox
since Feb 2023
Miscellaneous
Payment processors
Performance
Priority Hints
since Feb 2023
Search engines
Boost Commerce
since Feb 2022
Security
HSTS
since Sep 2022
Shopify apps
Swym Wishlist Plus
since Jul 2022
Webmail
Google Workspace
since Aug 2022
Audience
- 53% phone
- 47% desktop
United States
Countries where the site has Chrome traffic, strongest markets first.
Open Page Rank
1.69 / 10 · ranked #5,015,832 of all domains
3 referring domains · OpenPageRank
Core Web Vitals
| LCP | 1.4 s |
| INP | 75 ms |
| CLS | 0 |
| TTFB | 400 ms |
Real user p75, Chrome UX Report, Jun 2026.
Page
- Language: English
- CDN: Cloudflare
- Weight: 3.5 MB · 415 requests
- Structured data: Microdata, OpenGraph, Twitter Cards
Homepage as crawled by the HTTP Archive, Jul 2026.