However, according to "Jogu Shotoku Hooteisetsu" (Biography of Shotoku Taishi) and "The Origin of Gango-ji Temple," official introduction of Buddhism was on October 12 in the Bogo year (in the old lunar calendar, and it is guessed to be in 537 because it was not under the reign of the Emperor Kinmei), which is commonly believed.
しかし『上宮聖徳法王帝説』や『元興寺縁起』は、欽明天皇の戊午年10月12日(旧暦)（同年が欽明天皇治世下にないため（宣化3年）と推定されている）に仏教公伝されることを伝えており、こちらが通説になっている。