Shosan SUZUKI's duty theory, which was a similar thought and preceded Ishida's, did not fully explain the duty of merchants among Shinokosho (hereditary four-status order consisting of warrior-rulers, peasants, artisans, and merchants).
同様の思想で石田に先行する鈴木正三の職分説が士農工商のうち商人の職分を巧く説明出来なかった。