Exact translation means "art of softness", or "way of yielding". It is a Japanese martial art styles including unarmed and armed techniques. Originally came from the samurai of feudal Japan as a method for defeating without weapons. Due to the ineffectiveness of striking against an armored opponent, the most efficient methods for neutralizing an enemy took the form of pins, joint locks, and throws. These techniques were developed around the principle of using an attacker's energy against him, rather than directly opposing it.