What powers 
heartfm.jp?
Last seen Oct 2026 · 29 technologies across 15 categories
Analytics
CMS
Databases
Ecommerce
Font scripts
Hosting
JavaScript libraries
Miscellaneous
Performance
Photo galleries
Programming languages
UI frameworks
Video players
Web servers
WordPress plugins
AI Crawlers
Doesn't name any of the 33 AI crawlers we track in its robots.txt. Catch-all rules (User-agent: *) restrict some paths for every crawler, AI or not. Checked Nov 2026.
- robots.txt found
- llms.txt not found
- ai.txt not found
AI Crawlers
No AI crawlers blocked
Audience
- 70% phone
- 29% desktop
Japan
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
3.88 / 10 · ranked #670,292 of all domains
37 referring domains · OpenPageRank
Core Web Vitals
| LCP | 2.6 s |
| INP | 75 ms |
| CLS | 0.15 |
| TTFB | 1200 ms |
Real user p75, Chrome UX Report, Sep 2026.
Page
- Language: Japanese
- Weight: 19.7 MB · 163 requests
- WordPress theme: fmwave · all themes
Homepage as crawled by the HTTP Archive, Oct 2026.
Organisation
- Heart FM
- Founded: 2022
- Country: Japan
From Wikidata (CC0).
Infrastructure
- Hosted on Sakura Internet (133.167.16.146)
- DNS: Sakura Internet
- Email: heartfm.jp
- Email security: SPF (soft fail), no DMARC record
- SSL: Let's Encrypt, RSA 2048, expires Jan 2027
- Common Crawl link graph: rank 8,414,015
DNS records as swept Nov 2026, certificate as seen Nov 2026. How the web is hosted
Full technology history →
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Recent changes
- detected Fluent Forms Sep 2026
- detected Twitter Emoji (Twemoji) Sep 2026