The Old Jinya of the Nanbu domain is the ruins of a base camp located in Shiokubi-cho, Hakodate City, Hokkaido. It was constructed in 1799 by the Nanbu domain under the order of the Tokugawa Shogunate to reinforce the defenses of Hakodate. It was the main encampment that controlled sub-camps constructed in Muroran, Oshamanbe and Sunahara.

In 1821, when the Matsumae domain recovered its confiscated territory in Hokkaido, the base camps built by the Nanbu domain were dismantled. In 1855, when the Nanbu domain again received the order from the Shogunate to defend the areas in Hakodate including Cape Benten, they reconstructed their base camp. In 1868, with the advance of the soldiers who deserted the Tokugawa Shogunate, the Nanbu domain set fire on the base camps and abandoned the territories in Hokkaido.

The premise of the encampment was originally 16,200 sq m in area, but it was expanded to 36,000 sq m in the later eras. At the present time, only the stone walls and the monument erected by Iwate Nanbu Association remain in the ruins site.