At Mt. Kasagi is a deep cave named Ryuketsu (Dragon Cave), in which was said that Tosotsuten (The fourth of six Buddhist heavens in the world of desire) inhabited by Miroku was hidden.
笠置山には龍穴という奥深い洞窟があり、その奥は弥勒菩薩の住む兜率天へつながっていると言われていた。