Sandaihiho (the Three Great Secret Dharmas) comprises the fundamental dharmas in Buddhism by Nichiren and consists of Honmon no Honzon (the Object of Veneration of the Essential Teachings of the Lotus Sutra), Honmon no Kaidan (the Platform for the Receipt of the Precepts and Place of Practice of the Essential Teachings of the Lotus Sutra) and Honmon no Daimoku (the Sacred Title of the Essential Teachings of the Lotus Sutra).
三大秘法（さんだいひほう）とは、日蓮の仏教における根本的教義であり、本門の本尊、本門の戒壇、本門の題目の3つからなる。