What powers jfsc.jp?
Last seen Oct 2026 · 17 technologies across 10 categories
Analytics
Caching
CMS
Databases
Hosting
Miscellaneous
Programming languages
Security
Web servers
WordPress plugins
AI Crawlers
Restricts 16 of 33 AI crawlers we track by name in its robots.txt. Checked Oct 2026. A recent check saw a policy file missing; awaiting confirmation.
Training crawlers
- Applebot-Extended Restricted
- Bytespider Restricted
- ClaudeBot Restricted
- cohere-training-data-crawler Restricted
- Google-Extended Restricted
- GPTBot Restricted
- meta-externalagent Restricted
Search and AI assistants
- Amazonbot Restricted
- Applebot Restricted
- Claude-SearchBot Restricted
- OAI-SearchBot Restricted
- PerplexityBot Restricted
- YouBot Restricted
User-request fetchers
- ChatGPT-User Restricted
- Claude-User Restricted
- Perplexity-User Restricted
The other 17 AI crawlers we track are not mentioned and only inherit the catch-all rules that apply to every crawler.
- robots.txt found
- llms.txt found
- llms-full.txt found
- ai.txt not found
- Oct 2026 oai-searchbot: Restricted (was Allowed)
- Oct 2026 chatgpt-user: Restricted (was Allowed)
- Oct 2026 claude-searchbot: Restricted (was Allowed)
- Oct 2026 claude-user: Restricted (was Allowed)
- Oct 2026 bytespider: Restricted (was Allowed)
- Oct 2026 amazonbot: Restricted (was Allowed)
AI Crawlers
16 of 33 AI crawlers restricted
Standards: llms.txt, llms-full.txt
Audience
- 65% desktop
- 35% phone
Japan
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
1.38 / 10 · ranked #7,745,124 of all domains
3 referring domains · OpenPageRank
Core Web Vitals
| LCP | 1 s |
| INP | 50 ms |
| CLS | 0 |
| TTFB | 500 ms |
Real user p75, Chrome UX Report, Sep 2026.
Page
- Language: Japanese
- Weight: 0.3 MB · 8 requests
- Structured data: JSON-LD, OpenGraph, Twitter Cards
Homepage as crawled by the HTTP Archive, Oct 2026.
Organisation
From the homepage's own structured data (Oct 2026).
Infrastructure
- Hosted on Sakura Internet (49.212.198.76, IPv6)
- DNS: Sakura Internet
- Email: jfsc.jp
- Email security: SPF (soft fail), DMARC quarantine
- SSL: Let's Encrypt, RSA 2048, expires Dec 2026
- Common Crawl link graph: rank 33,891,866, 2 hosts
- Verified with: Google
DNS records as swept Oct 2026, certificate as seen Oct 2026. How the web is hosted
Full technology history →
Report an incorrect detection
Recent changes
- detected HSTS Aug 2026
- dropped Autoptimize Jun 2026
- dropped Contact Form 7 Jun 2026
- dropped core-js Jun 2026
- dropped Flickity Jun 2026
- dropped Genesis theme Jun 2026
- dropped Google Font API Jun 2026
- dropped jQuery Jun 2026
- dropped jQuery Migrate Jun 2026
- dropped prettyPhoto Jun 2026
- dropped PWA Jun 2026
- dropped Twitter Emoji (Twemoji) Jun 2026
- dropped ZURB Foundation Jun 2026
- detected RSS May 2026
- detected W3 Total Cache May 2026
- dropped Google Maps Feb 2026
- dropped jsDelivr Feb 2026
- dropped lit-element Feb 2026
- dropped lit-html Feb 2026
- dropped Priority Hints Feb 2026
- dropped RSS Feb 2026
- dropped Swiper Feb 2026
- dropped Lightbox Jan 2026
- dropped W3 Total Cache Jan 2026