He is renowned for his significant contributions to the foundation of Japanese statehood and culture, particularly through the promotion of Buddhism and the adoption of Chinese political and philosophical principles.

His most notable achievements include the promulgation of the Seventeen Article Constitution, which laid the groundwork for ethical governance and civil service, as well as his efforts to strengthen central authority over a fragmented feudal landscape.

Shōtoku's legacy is marked by his vision of a unified Japan, reflected in his innovative reforms and the establishment of diplomatic relations with the Sui Dynasty of China. His life and work continue to inspire reverence and admiration, as his influence shaped the trajectory of Japanese history for centuries to come.