One of the theories has it that the Saimen no Bushi was organized in preparation to overthrow the bakufu, while another theory holds it that it was created by the Retired Emperor who simply liked military arts, and that it has no relation to the Kamakura bakufu.
倒幕準備のために創設したとする説の他、武芸を好んだ上皇が鎌倉幕府とは関係なく創設したとする説もある。