It is quite possible that Prince Asa did make a portrait of Prince Shotoku, considering the active cultural exchange between Baekje and Japan at that time, during the Three Kingdoms period (of Korean history); however, the matter is still in doubt, due to stylistic problems with such an attribution and the fact that historical records in the Republic of Korea do not mention Prince Asa.
このように現在伝えられる聖徳太子像は、様式上の問題点と同時に、阿佐太子に対する記録が大韓民国側資料にはないという事実によって、未解決の課題だが、三国時代(朝鮮半島)当時の百済と日本との活発な交流を考慮すれば、その可能性は充分に認められる。