Ninjas used blowguns for stealth assassinations, foster confusion for the enemy as well as their animals, and for communication methods with other ninja. This device was most effective and accurate at an average range of 20 feet from the target. Several ninja disguised their blowguns as umbrellas, canes, and musical instruments to avoid suspicion from the enemy. Darts could fabricated from thin pieces of metal, paper cones, or split pieces of wood. Ninjas were known for attaching messages to darts as a form of communication.
Sensei Dr. David Jackson demonstrates how to use a blow gun in the video below.
Even though there are many types of blowguns, the following blowguns are required for all Aiki-Karate students: