In 753, Ganjin came to Japan from Tang after six voyages and established Kaidan (Buddhist ordination platform) at Todai-ji Temple and conferred commandments to the people such as the retired Emperor Shomu and Emperor Shotoku for the first time in Japan.
天平勝宝5年（753年）、鑑真が6度の航海の末に、唐から招来し、東大寺に戒壇を開き、聖武天皇太上天皇、称徳天皇を初めとする人々に日本で初めて戒律を授けた。