In order to respond to such increase in the number, the kurokuwa (unit) was divided into three groups at the end of the Edo period and each of which was headed by kumikashira (a head of group) (whose yakudaka was 35 bales) appointed by Kurokuwakashira.
こうした人数の拡大に対応するために、幕末には3組に分割され、黒鍬頭に任命された組頭（役高30俵1人扶持）が置かれた。