Ninjas are well know for many things and one of these is a mystical mental power that eclipses the average person. As important as the weapons of the ninja was their mental acuity inside a mission. One of these spiritual and mental strengths is know as Kuji-in which is a communication process with the hands. These signals were said to channel a universal energy. This type of hand signals for focused mental energy was started by the Budists.

The Kuji-in was performed before missions to help visualize a success full completion and bring about the powers that are need to do this. Below we have listed some of the Kuji-in signs performed by the hands. There are 81 total hand symbols but with 9 primary ones: