Soga no Umako
The most powerful "Omi" added the prefix to the O"mi" title, and were referred to as . Examples of "Ōomi" mentioned in the "Nihon Shoki" included during the reign of Emperor Richū, during the reign of Emperors Yūryaku and Seinei, during the reign of Emperor Keitai and the four generations of Sogas who dominated the title during the 6th and 7th centuries: Soga no Iname, Soga no Umako, Soga no Emishi and Soga no Iruka.