蘇我氏
was a leader of the Soga clan and a statesman during the reign of Emperor Kinmei in the Asuka period. He was the first person to hold the position of "Ōomi" that can be verified with reasonable accuracy, in 536 A.D. Essentially what this means: Japan's first head of government (or more precisely Yamato's) with the Ōkimi (later denoted Emperor) as head of state.