ninja

As Heichichiro Okuse says, it was cunning and deception that gave the ninja the edge over their enemies. These traits were emphasized and sharpened during ninjutsu training. The ninja raised espionage to a highly developed art centuries before such training was given to cloak-and-dagger agents in Western countries. There were three main categories of ninjutsu training for espionage: toiri-no-jutsu, or the tactics of sneaking into an enemy's camp; chikairi-no-jutsu, or infiltrating enemy lines after the outbreak of hostilities; and ongyo-jutsu, or the ruses of escape.

Keep Reading Show less