Umayado no Miko administered the state affairs in cooperation with SOGA no Umako, who was the head of the most powerful regional clan in those days, enhanced centralization of the Imperial government by emulating the advanced Chinese model, built up the Imperial military forces through the project for the expedition to Silla, and imported the advanced cultures and systems of the Sui Dynasty by dispatching envoys to establish and maintain diplomatic relations with the Sui Dynasty.
厩戸皇子は当時最大の豪族である蘇我馬子と協調して政治を行ない、隋の進んだ文化をとりいれて天皇の中央集権を強化し、新羅遠征計画を通じて天皇の軍事力を強化し、遣隋使を派遣して外交を推し進めて隋の進んだ文化、制度を輸入した。