What powers 
centwell.co.jp?
Last seen Aug 2026 · 19 technologies across 12 categories
Analytics
CMS
Databases
Ecommerce
JavaScript libraries
Page builders
Performance
Programming languages
Security
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 Sep 2026.
- robots.txt found
- llms.txt found
- ai.txt not found
AI Crawlers
No AI crawlers blocked
Standards: llms.txt
Audience
- 62% phone
- 38% desktop
Japan
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
4.69 / 10 · ranked #355,790 of all domains
59 referring domains · OpenPageRank
Core Web Vitals
| LCP | 2.5 s |
| INP | 100 ms |
| CLS | 0.25 |
| TTFB | 1800 ms |
Real user p75, Chrome UX Report, Aug 2026.
Page
- Language: Japanese
- Weight: 2.0 MB · 104 requests
- Structured data: JSON-LD
Homepage as crawled by the HTTP Archive, Sep 2026.
Organisation
From the homepage's own structured data (Sep 2026).
Infrastructure
- Hosted on GMO Internet (157.7.107.61)
- Email: no MX record returned, SPF names Lolipop
- Email security: SPF (soft fail), DMARC monitor only
- SSL: Let's Encrypt, RSA 2048, expires Oct 2026
- Common Crawl link graph: rank 221,386, 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
- dropped core-js Aug 2026
- dropped DreamWeaver Aug 2026
- dropped Facebook Pixel Aug 2026
- dropped jQuery Migrate Aug 2026
- dropped jsDelivr Aug 2026
- dropped Slick Aug 2026
- dropped WP Rocket Aug 2026
- detected Contact Form 7 Jul 2026
- detected LazySizes Jul 2026
- detected Swiper Jul 2026
- detected WordPress Block Editor Jul 2026
- detected jsDelivr Oct 2025