Ryōgen (912-985), also known as Jie Daishi, was the 18th chief abbot of Enryaku-ji, the head Tendai monastery located on Mount Hiei in Ōtsu. He is considered a restorer of the Tendai school of Mahayana Buddhism, and credited for reviving Enryaku-ji. It was Ryōgen's son Renmyo who requested the creation of a posthumous portrait of his father, in prayer for his rebirth in the Pure Land, the celestial realm in Mahayana Buddhism.