The internal debate in the Fujufuse school, which occurred in 1682 in Okayama, led to the split of Fujufuse school into two schools, namely the Doshi school and the Fudoshi school, and the Fudoshi school to which Nikko belonged became independent as Fujufuse Nichiren Komon Sect.
1682年（天和2年）、岡山で起きた不受不施派内の論争は、不受不施派を導師派と不導師派に二分し、不導師派の日講の系統は不受不施日蓮講門宗となる。