Furthermore, Shinichi SATO described that battle formation transformation as the last spread of the 'bushi' class that had 'akuto' (rebel or a villain in medieval times) and 'aburemono' (a good-for-nothing) as their predecessors.
また佐藤進一はその戦闘様式の変化を、槍の登場と合わせて「悪党」や「溢者」を前身とする「武士」層の末広がりとされる。