Governing in consultation with Prince Shotoku, Umako promoted the spread of Buddhism in Japan, drew up the Seventeen-Article Constitution to establish a centralized political system and sent Kenzui-shi (imperial envoys to China) to introduce advanced social systems and academic disciplines from China.
馬子は聖徳太子と合議して政治運営し、仏教を奨励し、冠位十二階や十七条憲法を定めて中央集権化を進め、遣隋使を派遣して隋の社会制度や学問を輸入した。