The Sanmon School stressed multiple-religious learning of the four religious sects of En (teachings of Tendai Sect), Esoteric, Zen and Kai (Commandment) with Engyo (Perfect Teaching) as the center, but Tendai Jimon Sect added the way of asceticism and followed the five Buddhist teachings of En, Esoteric, Zen, Kai and Asceticism.
山門派は法華経の円教を中心とした円・密・禅・戒の天台宗四宗兼学を唱えるが、天台寺門宗はこれに修験道を加えて、円・密・禅・戒・修験の五法門となる。