Ninjitsu
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| Also known as | Ninpō, Shinobi-jutsu |
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| Hardness | Non-competitive |
| Country of origin |
 Japan
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| Parenthood | Military tactics |
Ninjutsu (忍術?), sometimes used interchangeably with the modern term ninpō (忍法?), is the strategy and tactics of unconventional warfare, guerrilla warfare and espionage purportedly practiced by the shinobi (commonly known outside Japan as ninja).Ninjutsu was a separate discipline in some traditional Japanese schools, which integrated study of more conventional martial arts (taijutsu) along with shurikenjutsu, kenjutsu, sōjutsu, bōjutsu and others.
While there is an international martial arts organization representing several modern styles of ninjutsu, the historical lineage of these styles is disputed. Some schools claim to be the only legitimate heir of the art, but ninjutsu is not centralized like modernized martial arts such as judo or karate.Togakure-ryū claims to be the oldest recorded form of ninjutsu, and claims to have survived past the 16th century.
Spying in Japan dates as far back as Prince Shōtoku (572–622), although the origins of the ninja date much earlier. According to Shōninki, the first open usage of ninjutsu during a military campaign was in the Genpei War, when Minamoto no Kuro Yoshitsune chose warriors to serve as shinobi during a battle. This manuscript goes on to say that during the Kenmu era, Kusunoki Masashige frequently used ninjutsu. According to footnotes in this manuscript, the Genpei War lasted from 1180 to 1185, and the Kenmu Restoration occurred between 1333 and 1336.Ninjutsu was developed by groups of people mainly from Kōka and the Iga Province of Japan.
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