Seifu NAGAMATSU (also known as Nissen), who had been skeptical about his life, embraced the Honmon (main school) of the Lotus Sutra and became a Buddhist monk but didn't satisfied only by it; subsequently, in 1857 at 41 years of age he took an independent path by opening the doors of Honmon Butsuryu ko association, which stressed Zaike shugi (lay people doctrine) in Takoyakushi, Kyoto.
長松清風（日扇）は、人生への懐疑から法華経本門の教えに帰依して出家したがあきたらず、やがて独自の道を歩み、1857年（安政4年）41歳のとき京都蛸薬師に在家主義の本門佛立講を開いたのに始まる。