What powers 
f-sfc.co.jp?
Last seen Aug 2026 · 17 technologies across 13 categories
Analytics
Google Analytics
since Dec 2022
CDN
cdnjs
since Dec 2022
Cloudflare
since Dec 2022
CRM
Salesforce
since May 2026
Editors
DreamWeaver
since Dec 2022
Font scripts
Google Font API
since Jun 2025
Hosting
Sakura Internet
since Dec 2022
JavaScript frameworks
GSAP
since Dec 2022
JavaScript libraries
Operating systems
Windows Server
since Apr 2026
Tag managers
Google Tag Manager
since Dec 2022
Web server extensions
Web servers
Nginx
since Dec 2022
Webmail
Microsoft 365
since Apr 2026
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
- 100% desktop
Japan
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
3.54 / 10 · ranked #852,988 of all domains
25 referring domains · OpenPageRank
Core Web Vitals
| LCP | 1.3 s |
| INP | 25 ms |
| CLS | 0 |
| TTFB | 300 ms |
Real user p75, Chrome UX Report, Aug 2026.
Page
- Weight: 3.7 MB · 107 requests
- Structured data: Microdata
Homepage as crawled by the HTTP Archive, Sep 2026.
Infrastructure
- DNS: Sakura Internet
- Email: Microsoft 365
- Email security: SPF (hard fail), DMARC monitor only
- SSL: GlobalSign, RSA 2048, expires Mar 2027
- Common Crawl link graph: rank 10,311,409, 2 hosts
- Verified with: Google, Microsoft 365
DNS records as swept Sep 2026, certificate as seen Sep 2026. How the web is hosted
Subdomains
| Host | Techs |
|---|---|
| www.f-sfc.co.jp | 13 |
| speed.f-sfc.co.jp | 5 |
Full technology history →
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Recent changes
- detected Salesforce May 2026