co.jp vs One.com

One.com is used by more websites in our catalog: 205 use co.jp and 770 use One.com.

co.jp sites have the higher median Ahrefs Domain Rating (co.jp: 60, One.com: 22).

Between 2026-06 and 2026-07, co.jp went from 0.03% to 0.02% of all tracked sites, while One.com went from 0.10% to 0.09%. co.jp is gaining ground faster in our index.

No. A site runs a single email host, so co.jp and One.com are mutually exclusive.

Adoption is counted from Site Stats Database's own crawl; Domain Rating comes from Ahrefs and traffic from DataForSEO. Figures reflect the sites we track and refresh at least monthly.