It is said to be the beginning of Hyakusai-ji Temple, and the temple was named Hyakusai-ji Temple (百済寺) because it was modeled after the Ryoun-ji Temple in Kudara (Baekje, Paekche) (百済).
これが百済寺の始まりであるといい、百済の龍雲寺にならって寺を建てたので百済寺と号したという。