The protective equipment for defense against hinawaju, such as Tosei-gusoku (armor), taketaba (a bamboo shield against firearms) and so on, spread and as a result, it was mainly used instead of a small barrel.
当世具足や竹束などの火縄銃に対応した防御装備が広まった結果、小筒に替わり主に用いられる様になった。