Nanbu Shigenao (南部重直, 16 April 1606 – 30 October 1664) was an early Edo period Japanese samurai, and the 2nd daimyō of Morioka Domain in northern Japan.

[1] Shigenao was the 3rd son of Nanbu Toshinao, and was born at the clan's Sakurada residence in Edo.

Of severe disposition, he had no heir and adopted a son of Hotta Masamori, daimyō of Sakura Domain, which also opened the possibility for the clan to change to fudai daimyō status.

However, in April 1636, his sankin-kōtai procession arrived in Edo ten days late, which was a violation of the new Buke shohatto regulations issued by shōgun Tokugawa Iemitsu, and he was declared unfit to govern, and sentenced to house arrest at the clan residence in Edo.

[1] After his death in Edo in 1664, the Tokugawa shogunate intervened, and by order of Shogun Tokugawa Ietsuna appointed his younger brother Shichinohe Shigenobu as the next daimyō, with the son of Hotta Masamori reduced to hatamoto status.