Kuju-Kiri

One aspect of ninjutsu is kuji-kiri, or signs made with the fingers to assist them in self-control during moments of danger.. In practicing kuji-kiri, there were 81 different ways the ninja could knit his fingers together. At the same time, he chanted Buddhist sutras, or maxims from the scriptures.
The practice not only restored confidence and gave the ninja inner strength in moments of danger but also promote a healthy mental state. A ninjas perk was the unbreakable concentration. By using Kuji-Kiri a ninja would focus and calm their mind. Within seconds a ninja became so focused they could read their opponents spirit, mind, and body. This is a very special skill for a ninja to posses for dealing with life and death situations.
 

Ninjustu

 

The Life of a ninja was not just shadows, swords, and stealth. Although mainstream media makes the ninja warrior look like a vicious murder. To be consider a true ninja in Japan meant a whole lifestyle. It has been said a ninja in training would run 50 miles a day, climb obstacles for hour, and exercise extensively. However more than physical, a real ninja practiced mental discipline. Regular deep meditations were the source of a ninjas powers. A ninja would meditate daily on power of mind and body, energy, balance, health, safety, empathy, consistency, environment, and enlightenment. Many folklore refer to ninjas and demons of the night with dark magical power. It is true that these masked figures could preform amazing things, but in reality these warriors were just passionate devoted human beings. A great example of what can be achieved through commitment and determination.