odutsu (canon)

 The ninja developed a variety of guns such as canons, long guns, and wooden guns and used them effectively. Specifically, wooden guns, in which iron chips and gravel were charged and shot, were suitable for killing or injuring many enemy fighters with a single shot. Moreover, wooden guns were advantageous in that they were simple and inexpensive to construct and easy to carry, so the ninja did not mind if they would break.