What powers jscs.jp?
Last seen Jan 2026 · 16 technologies across 12 categories
CMS
Databases
MySQL
since Jul 2022
JavaScript libraries
Clipboard.js
since Dec 2025
Swiper
since Dec 2025
Miscellaneous
Open Graph
since Dec 2025
RSS
since Jan 2023
Operating systems
Ubuntu
since Dec 2025
Page builders
WordPress Block Editor
since Dec 2025
Programming languages
PHP
since Jul 2022
Security
HSTS
since Dec 2025
UI frameworks
Web servers
WordPress plugins
Polylang
since Dec 2025
WordPress themes
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 Oct 2026.
- robots.txt found
- llms.txt not found
- ai.txt not found
AI Crawlers
No AI crawlers blocked
Audience
- 100% desktop
Japan
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
4.45 / 10 · ranked #409,437 of all domains
37 referring domains · OpenPageRank
Core Web Vitals
| LCP | 0.4 s |
| CLS | 0 |
| TTFB | 200 ms |
Real user p75, Chrome UX Report, Aug 2026.
Infrastructure
- Hosted on Sakura Internet (133.242.189.240)
- DNS: jscs.jp
- Email: Google Workspace
- Email security: SPF (soft fail), no DMARC record
- SSL: Let's Encrypt, ECDSA P256, expires Dec 2026
- Common Crawl link graph: rank 131,251, 2 hosts
- Verified with: Google
DNS records as swept Oct 2026, certificate as seen Oct 2026. How the web is hosted
Full technology history →
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Recent changes
- dropped Contact Form 7 Jan 2026
- dropped Plesk Jan 2026
- dropped Twitter Emoji (Twemoji) Jan 2026