Due to the entreaty from his mother on her deathbed in 1232, he entered a priesthood at Kakuan-ji Temple, Yamato Province when he was 16, and received Jukai (handing down the precepts) at Todai-ji Temple the following year.
1232年死の床にあった母の懇願により、16歳で大和国額安寺に入って出家、翌年東大寺にて授戒を受ける。