What powers 
postcard.jp?
Last seen Sep 2026 · 20 technologies across 12 categories
Advertising
Analytics
Google Ads Conversion Tracking
since Jul 2021
Google Analytics
since Jan 2019
Microsoft Clarity
since Nov 2023
Authentication
Facebook Login
since Jun 2021
CDN
Amazon CloudFront
since Oct 2019
Google Hosted Libraries
since Nov 2023
Ecommerce
Cart Functionality
since Aug 2022
JavaScript libraries
Marketing automation
Miscellaneous
Open Graph
since Sep 2022
PWA
since Aug 2022
PaaS
Amazon Web Services
since Oct 2019
Security
HSTS
since Sep 2022
Tag managers
Google Tag Manager
since Dec 2016
Web servers
Apache HTTP Server
since Dec 2016
AI Crawlers
Doesn't mention any of the 33 AI crawlers we track in its robots.txt; all are allowed by default. Checked Oct 2026.
- robots.txt found
- llms.txt not found
- ai.txt not found
AI Crawlers
No AI crawlers blocked
Audience
- 79% phone
- 21% desktop
Japan
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
4.69 / 10 · ranked #356,066 of all domains
54 referring domains · OpenPageRank
Core Web Vitals
| LCP | 0.7 s |
| INP | 75 ms |
| CLS | 0 |
| TTFB | 300 ms |
Real user p75, Chrome UX Report, Sep 2026.
Page
- Language: Japanese
- CDN: Amazon CloudFront
- Weight: 2.2 MB · 129 requests
- Structured data: JSON-LD, OpenGraph
Homepage as crawled by the HTTP Archive, Oct 2026.
Infrastructure
- Hosted on Amazon Web Services (35.71.133.99)
- DNS: fujifilm.co.jp
- Email: no MX record returned
- SSL: GlobalSign, RSA 2048, wildcard, expires Feb 2027
- Common Crawl link graph: rank 1,176,955, 2 hosts
- Verified with: GlobalSign
DNS records as swept Oct 2026, certificate as seen Oct 2026. How the web is hosted