These teachings were divided into two at Enryaku-ji Temple on Mt. Hiei, which was the head temple of the Nihon Tendai Sect, by two giants of Ennin, namely the third Tendai zasu and Enchin, who was the fifth Tendai zasu.
この教えは、第3代天台座主円仁と第5代天台座主円珍の2人の巨人の登場により、日本天台宗本山の比叡山延暦寺で2つに分かれてしまう。