Nichiren Sect separated into many religious schools after the beginning of the religion, and one of them is called Kuon-ji Temple on Mt. Minobu, sozan (the mountain of the foundation) Nichiren Sect, where there are many believers from samurai families, and they strengthened their power under the bakufu government and came to control the whole Nichiren Sect.
日蓮宗はその開教以降、幾多の宗派に分派したが、その中でも日蓮宗の祖山とされる身延山久遠寺は武家の帰依者が多く、幕府統治下で勢力を拡大し、日蓮宗の総元締といえるほどとなった。