The duties were instruction of gunnery, production, preservation and repair of guns as well as elimination of wild boars and wolves and to arrest robbers and arsonists.
砲術の教授、鉄砲の製作、保存、修理を主な任務とし、イノシシやオオカミの打ち払い、火付や盗賊の逮捕にもあたった。