In 1682, however, disputes arose inside the religious order in the Okayama region concerning whether naishin, who ostensibly pretended to be believers of other sects or schools, could be treated equally with pure believers of fujufuse as well as whether horyu could officiate, instead of hocchu, as doshi (Lead Chanter) in Kangyo sutra (The Sutra of Visualization of the Buddha of Measureless Life) for the sake of naishin.
しかしそのような状況の中も教団内では、天和2（1682）年頃岡山を中心とした地域において、外見上他宗他派を装う内信者と純粋な不受不施信者を同一に並べてよいか、法立が内信者のために法中の代わりに観経の導師を勤めてよいかということについて、論争が起こった。