What powers 
yis.ac.jp?
Last seen Aug 2026 · 61 technologies across 28 categories
Advertising
Analytics
CDN
CMS
Comment systems
Cookie compliance
Databases
Ecommerce
Editors
Font Scripts
Issue trackers
JavaScript frameworks
JavaScript libraries
Maps
Miscellaneous
PaaS
Payment processors
Performance
Photo galleries
Programming languages
Security
SEO
Tag managers
Web servers
Webmail
WordPress plugins
WordPress themes
AI Crawlers
Doesn't mention any of the 33 AI crawlers we track in its robots.txt; all are allowed by default. Checked Sep 2026.
- robots.txt found
- llms.txt not found
- ai.txt not found
AI Crawlers
No AI crawlers blocked
Audience
- 68% desktop
- 32% phone
Japan
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
4.35 / 10 · ranked #427,014 of all domains
77 referring domains · OpenPageRank
Core Web Vitals
| LCP | 1.3 s |
| INP | 50 ms |
| CLS | 0 |
| TTFB | 800 ms |
Real user p75, Chrome UX Report, Aug 2026.
Page
- Language: English (United States)
- CDN: Cloudflare
- Weight: 3.7 MB · 92 requests
- WordPress theme: hello-elementor (child: hello-theme-child) · all themes
- Structured data: JSON-LD, OpenGraph, Twitter Cards
Homepage as crawled by the HTTP Archive, Sep 2026.
Organisation
- Yokohama International School
- Founded: 1924
- Country: Japan
From the homepage's own structured data (Sep 2026) and Wikidata (CC0).
Infrastructure
- Hosted on Cloudflare (162.159.136.54)
- DNS: DNS Made Easy
- Email: Google Workspace
- Email security: SPF (soft fail), DMARC quarantine, MTA-STS
- SSL: Google Trust Services, ECDSA P256, expires Nov 2026
- Common Crawl link graph: rank 2,045,591, 8 hosts
- Verified with: 1Password, Adobe, Autodesk, Google, LinkedIn, Workplace from Meta, Microsoft 365, Stripe
DNS records as swept Sep 2026, certificate as seen Sep 2026. How the web is hosted
Subdomains
| Host | Techs |
|---|---|
| www.yis.ac.jp | 29 |
| yis.ac.jp | 24 |
| photos.yis.ac.jp | 15 |
| odoo.yis.ac.jp | 13 |
| blogs.yis.ac.jp | 4 |
Full technology history →
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Recent changes
- dropped Cloudways May 2026
- detected Cloudways Mar 2026
- dropped Cloudways Jan 2026
- detected Twitter Emoji (Twemoji) Dec 2025
- dropped Site Kit Nov 2025