Legends relating to Roben (689-773), founding priest of Todai-ji Temple and first Betto (a monk who manages the affairs of a temple), and his disciple Jitchu, believed to be the founder of 'Shuni-e' (Omizutori or Sacred Water-drawing Festival) ceremony, also remain at Kasagi-dera Temple.
また笠置寺には東大寺の開山で初代別当（寺務を統括する僧）であった良弁（ろうべん、689-773）や、その弟子で「修二会」の創始者とされる実忠にかかわる伝承も残っている。