What powers duffer.jp?
Last seen Jun 2026 · 28 technologies across 16 categories
Advertising
Affiliate programs
A8.net
since Oct 2023
Analytics
Google Ads Conversion Tracking
since Jul 2021
Google Analytics
since Jan 2019
Microsoft Clarity
since May 2021
CDN
Documentation
Zendesk
since Jan 2026
Ecommerce
Cart Functionality
since Aug 2020
JavaScript frameworks
React
since Nov 2021
JavaScript libraries
Load balancers
Amazon ALB
since Nov 2021
Miscellaneous
Open Graph
since Sep 2022
PaaS
Amazon Web Services
since Jan 2019
Photo galleries
PhotoSwipe
since Sep 2022
Reverse proxies
Envoy
since Jan 2026
RUM
Akamai mPulse
since Aug 2021
Security
Cloudflare Bot Management
since Nov 2021
HSTS
since Jan 2026
Tag managers
Google Tag Manager
since Jan 2019
Audience
- 81% phone
- 18% desktop
Japan
Countries where the site has Chrome traffic, strongest markets first.
Open Page Rank
2.53 / 10 · ranked #2,447,127 of all domains
12 referring domains · OpenPageRank
Core Web Vitals
| LCP | 2.5 s |
| INP | 100 ms |
| CLS | 0.5 |
| TTFB | 1500 ms |
Real user p75, Chrome UX Report, Jun 2026.
Page
- CDN: Akamai
- Weight: 4.0 MB · 203 requests
- Structured data: OpenGraph, Twitter Cards
Homepage as crawled by the HTTP Archive, Jul 2026.
Subdomains
| Host | Techs |
|---|---|
| www.duffer.jp | 23 |
| support.duffer.jp | 7 |
Full technology history →
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Recent changes
- dropped Adobe Audience Manager Aug 2025