Abstract
This paper is a commemorative lecture at the International Ninja Society held in Ueda City in 2019, “On the Real Image of Shinobi in the Sengoku period”. Shinobi has a variety of names such as （1） Kusa, Kamari, Suppa, Rappa, and Toppa, and （2）they were placed on the front lines on the battlefield, and have been tasked with guarding the camp at night and night debate. In addition, for nighttime enemy castle infiltration, arson, hijacking, etc., Sengoku Daimyo was expected to make a great contribution in areas other than the battle between regular troops, and（ 3） the origin was mainly from the villain（ outlaw）.（ 4）There were also some people who were mobilized from the village town by Sengoku Daimyo. Shinobi is organized as “Ashigaru” in the army of Sengoku Daimyo, and is mainly used for nighttime battles （night attack, infiltration）, enemy forts, infiltration into the camp, arson, ambush and looting at the front line. I made it clear. that the leason he also pointed out that the
reason behind the employment of the Sengoku Daimyo was not only the military demand, but also the security of the territory.
