There were two types of samurai in the bakufu: those who had come from samurai families since the Kamakura bakufu, and emerging samurai who used to be called akuto (a villain in the medieval times) and were illegitimate children forced to stay with their families.
また、幕府内には鎌倉幕府以来の武士層とかつては悪党と呼ばれた人々や惣領の傘下に入ることを余儀なくされた庶子層などからなる新興武士層が存在した。