Chinjufu shōgun (鎮守府将軍), often translated as "Commander-in-Chief of the Defense of the North," was a military post in classical and feudal Japan. The Chinjufu shōgun, under the command of the sei-i-tai-shōgun (shogun), was primarily responsible for the pacification of the Ezo (Ainu) people of northern Honshū and Hokkaidō, and Japan's defense against them.
The post was originally created in the eighth century, during the Nara period, and a military district, called Chinjufu was established as the Chinjufu shōgun's area of authority. It was originally located in the fortress of Tagajō in what is now Miyagi prefecture. However, it was moved further north in 801, after the Chinjufu shōgun at the time, Sakanoue no Tamuramaro achieved a series of victories against the natives, pushing them further north. Once all of Honshū was conquered, or pacified, by the Japanese, the new base at Azawajō came to be controlled by the various samurai clans of that region. The base, along with the Chinjufu military district and the position of Chinjufu shogun, was abandoned in the early 14th century.