There are various theories as to the definition of Mokkatsuji-ban among researchers: one theory is that it started from the Kanei era (1624-1643): another theory is from the Tenmei and the Kansei eras (1781-1800).
研究家の間でも定義づけに諸説があり、寛永年間以後とする説と天明あるいは寛政年間以後とする説に分かれる。