What powers 
kanzen.jp?
Last seen Aug 2026 · 10 technologies across 7 categories
Analytics
Font scripts
JavaScript libraries
Miscellaneous
Programming languages
Web frameworks
Web servers
AI Crawlers
Blocks 10 of 33 AI crawlers we track by name in its robots.txt. Checked Sep 2026.
Training crawlers
- Bytespider Blocked
- CCBot Blocked
- ClaudeBot Blocked
- GPTBot Blocked
- meta-externalagent Blocked
Search and AI assistants
- Amazonbot Blocked
- Applebot Blocked
- Claude-SearchBot Blocked
- OAI-SearchBot Blocked
- PetalBot Blocked
The other 23 AI crawlers we track are not mentioned and only inherit the catch-all rules that apply to every crawler.
- robots.txt found
- llms.txt not found
- ai.txt not found
AI Crawlers
10 of 33 AI crawlers blocked
Audience
- 51% phone
- 49% desktop
Japan
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
4.95 / 10 · ranked #251,753 of all domains
83 referring domains · OpenPageRank
Core Web Vitals
| LCP | 1.7 s |
| INP | 50 ms |
| CLS | 0.15 |
| TTFB | 600 ms |
Real user p75, Chrome UX Report, Aug 2026.
Page
- Language: Japanese
- Weight: 4.7 MB · 66 requests
- Structured data: OpenGraph, Twitter Cards
Homepage as crawled by the HTTP Archive, Sep 2026.
Organisation
- KANZEN
- Country: Japan
From Wikidata (CC0).
Infrastructure
- Hosted on SO-NET Sony Network Communications Inc. (182.169.74.66)
- DNS: alpha-prm.jp
- Email: alpha-prm.jp
- Email security: SPF (soft fail), DMARC monitor only
- SSL: Nijimo, Inc., RSA 2048, expires Jan 2027
- Common Crawl link graph: rank 1,059,906, 4 hosts
DNS records as swept Sep 2026, certificate as seen Sep 2026. How the web is hosted
Full technology history →
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Recent changes
- detected Laravel Aug 2026
- dropped Laravel May 2026
- dropped Twitter May 2026
- dropped Twitter Ads May 2026
- dropped Cloudflare Nov 2025
- dropped Cloudflare Bot Management Nov 2025