What is ninja

In the history of Japan, a ninja was someone specially trained in a variety of unorthodox arts of war. The methods used by ninja included assassination, espionage, and a variety of martial arts.
In the Japanese culture, they were usually trained for dangerous missions.[citation needed]Their exact origins are still unknown. Their roles may have included sabotage, espionage, scouting and assassination missions as a way to destabilize and cause social chaos in enemy territory or against an opposing ruler, perhaps in the service of their feudal rulers (daimyo, shogun), or an underground ninja organization waging