Soga no Umako
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Soga no Umako (蘇我馬子; 551? - 20 May 626), the son of Soga no Iname and the strongest member of Soga clan of Japan, conducted political reforms with Prince Shotoku during the rules of Emperor Bidatsu and Empress Suiko, and established Soga clan's stronghold in the governemt by having his daughter married with members of the royal family. According to Nihongi and the Suiko section of Fusō-ryakuki (compiled by the monk Kōen during the early thirteenth century), the records say that, on January 15, 593, when relics of Buddha were deposited inside the foundation stone under the pillar of a pagoda at Hokoji, the Great Minister Soga Umako, together with hundred people, had appeared wearing Paekche clothes, and the spectators were very much delighted.
Ishibutai Tomb is believed to be the tomb of Soga no Umako.