The blowgun, known as fukiya, was used to shoot darts (sometimes poisoned) at an enemy from a distance and, since it made almost no noise, the Ninja’s hiding place wasn’t threatened by using this weapon. Aside from launching darts, the blowgun could be used as a snorkel while the Ninja was underwater. Since the fukiya was made of bamboo, it blended in with the reeds in the water, therefore enabling the Ninja to stay submerged for hours, if necessary.
This paperback book by Amante P. Marinas Sr. is a complete introduction to one of the world's oldest weapons. It provides detailed explanations and instructions on all aspects of the blowgun's use—from grips and stances, to targets and trajectories, to how to construct your own blowgun.