Ninja comes from China which then traveled to Japan during the Tang Dynasty. The Japanese developed Ninja martial arts, by creating a deadly killer, who can sneak in without being detected and then strike suddenly.
The origin of the ninja is not clear and difficult to ascertain. Historically, they have approximately the 14th century. In a detailed written record of the ninja activities that they are also known as shinobi "experts in the field gathering information," or "master of disguise and move quietly" that can penetrate enemy territory to observe every move and obtain confidential information without being detected. In the Sengoku period (Japanese wartime in the 15th century - 17), mercenaries and spies for the rent comes from the Iga and Koga in Japan, and from this clan and a lot of knowledge about the ninja is inferred.
The origin of the ninja is not clear and difficult to ascertain. Historically, they have approximately the 14th century. In a detailed written record of the ninja activities that they are also known as shinobi "experts in the field gathering information," or "master of disguise and move quietly" that can penetrate enemy territory to observe every move and obtain confidential information without being detected. In the Sengoku period (Japanese wartime in the 15th century - 17), mercenaries and spies for the rent comes from the Iga and Koga in Japan, and from this clan and a lot of knowledge about the ninja is inferred.