His main accomplishments included the formation of Kan I junikai (12 grades of cap rank) and the Seventeen-Article Constitution, the dispatch of a Japanese envoy (ONO no Imoko) to the Sui dynasty of China, and the establishment of Shitenno-ji and Horyu-ji Temples.
冠位十二階、十七条憲法の制定、遣隋使（小野妹子）の派遣、四天王寺、法隆寺などの建立などが主だった業績である。