Ninja clans were the prototype of modern special forces in many ways. They were able to infiltrate the enemy lines, sabotage, spy and assassinate people in a variety of unique and uncommon ways. Ninjas, have always been contrasted with the samurai, who had strict rules about combat and honor. Ninjas in Japan had many things in common with assassins in Middle East.
The first recorded use of espionage conducted by ninjas was in the 6th century. Later, in the 15th century ninjas emerged as mercenaries. They were recruited by opposing lords of feudal Japan to perform the funcions of spies, raiders, and terrorists.
There are different secret hand combinatinations (kanjis or mudras)that ninjas used to modify their own state of mind and the one of their enemies. In this video you’ll see how to create them:
Ninja practices have been put into basics of training of various special forces units all around the world.
There exist many movies about ninjas, such for example as: