What powers retro.jp?
Last seen Jun 2026 · 63 technologies across 26 categories
Advertising
Yahoo Advertising
since Oct 2022
Analytics
Google Analytics
since Aug 2018
Authentication
Facebook Login
since Jul 2021
CDN
cdnjs
since Nov 2021
Cloudflare
since May 2022
Google Hosted Libraries
since Feb 2022
jQuery CDN
since Feb 2022
jsDelivr
since May 2021
Unpkg
since Feb 2025
CMS
WordPress
since Aug 2018
Databases
MySQL
since Aug 2018
Documentation
Zendesk
since Feb 2024
Ecommerce
Font scripts
Google Font API
since Aug 2018
Twitter Emoji (Twemoji)
since Aug 2018
JavaScript frameworks
Vue.js
since Nov 2024
JavaScript libraries
Miscellaneous
HTTP/3
since Nov 2024
Open Graph
since Sep 2022
Popper
since Apr 2024
RSS
since Dec 2022
Webpack
since Apr 2024
Operating systems
Ubuntu
since Apr 2024
Windows Server
since Jul 2020
PaaS
Amazon Web Services
since Aug 2022
Payment processors
American Express
since Nov 2024
Mastercard
since Nov 2024
Shop Pay
since Nov 2024
Visa
since Nov 2024
Performance
Priority Hints
since May 2024
Programming languages
PHP
since Aug 2018
Reviews
Trustindex
since Jul 2023
RUM
New Relic
since Feb 2025
Security
Tag managers
Google Tag Manager
since Dec 2018
UI frameworks
Web frameworks
Laravel
since Apr 2024
Web servers
WordPress plugins
a3 Lazy Load
since Feb 2022
Autoptimize
since May 2025
RankMath SEO
since Nov 2023
WP Rocket
since Mar 2021
Audience
- 50% desktop
- 50% phone
Japan
Countries where the site has Chrome traffic, strongest markets first.
Open Page Rank
4.10 / 10 · ranked #507,887 of all domains
66 referring domains · OpenPageRank
Core Web Vitals
| LCP | 0.9 s |
| INP | 100 ms |
| CLS | 0 |
| TTFB | 400 ms |
Real user p75, Chrome UX Report, Jun 2026.
Page
- Language: Japanese
- Weight: 5.9 MB · 253 requests
- Structured data: Microdata, OpenGraph, Twitter Cards
Homepage as crawled by the HTTP Archive, Jul 2026.
Subdomains
| Host | Techs |
|---|---|
| itaku.retro.jp | 33 |
| retro.jp | 22 |
| auction.retro.jp | 21 |
| global.retro.jp | 21 |
| corporate.retro.jp | 19 |
| consign.retro.jp | 9 |
Full technology history →
Report an incorrect detection
Recent changes
- dropped FingerprintJS May 2026
- detected Sendgrid Jan 2026
- detected Site Kit Jan 2026
- dropped Boomerang Aug 2025