What powers chart.co.jp?
Last seen Jun 2026 · 29 technologies across 18 categories
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Top search keywords
| Keyword | Position | Est. monthly visits |
|---|---|---|
| cos72 degree | #46 | 0 |
| cos72 | #29 | 0 |
| tan72 | #38 | 0 |
| value1700 | #18 | 0 |
| sina sinb sinc | #19 | 0 |
| suken | #49 | 0 |
| keeping powder dry | #69 | 0 |
| log10/7 | #77 | 0 |
| make progress in english reading | #48 | 0 |
The site's top keywords in Google (US), with the visits each one is estimated to bring per month.
Top backlinks
Top links pointing at the site, one per source domain, strongest first. The anchor text opens the page carrying the link.
Audience
- 59% phone
- 40% desktop
- 2% tablet
Japan
Countries where the site has Chrome traffic, strongest markets first.
Open Page Rank
5.77 / 10 · ranked #131,079 of all domains
120 referring domains · OpenPageRank
Search traffic
0 est. monthly organic visits (US)
9 keywords in Google's top 30
Core Web Vitals
| LCP | 2.2 s |
| INP | 125 ms |
| CLS | 0 |
| TTFB | 300 ms |
Real user p75, Chrome UX Report, Jun 2026.
Page
- Language: Japanese
- CDN: Amazon CloudFront
- Weight: 2.1 MB · 27 requests
Homepage as crawled by the HTTP Archive, Jul 2026.
Subdomains
| Host | Techs |
|---|---|
| cds.chart.co.jp | 13 |
| www.chart.co.jp | 13 |
| support.chart.co.jp | 11 |
| account.chart.co.jp | 8 |
| lab.chart.co.jp | 8 |
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Recent changes
- dropped Webpack Sep 2025