| Nanbu clan 南部氏 | |
|---|---|
 Nanbu clan emblem | |
| Home province | Kai Mutsu |
| Parent house |  Minamoto clan |
| Titles | Various |
| Founder | Minamoto no Mitsuyuki |
| Final ruler | Nanbu Toshiyuki |
| Current head | Toshifumi Nanbu |
| Founding year | 1180 |
| Dissolution | still extant |
| Ruled until | 1873 (Abolition of the han system) |
The Nanbu clan (南部氏, Nanbu-shi) was a Japanese samurai clan who ruled most of northeastern Honshū in the Tōhoku region of Japan for over 700 years, from the Kamakura period through the Meiji Restoration of 1868. The Nanbu claimed descent from the Seiwa Genji of Kai Province and were thus related to the Takeda clan. The clan moved its seat from Kai to Mutsu Province in the early Muromachi period, and were confirmed as daimyō of Morioka Domain under the Edo-period Tokugawa shogunate. The domain was in constant conflict with neighboring Hirosaki Domain, whose ruling Tsugaru clan were once Nanbu retainers.
During the Boshin War of 1868–69, the Nanbu clan fought on the side of the Ōuetsu Reppan Dōmei, supporting the Tokugawa regime. After Meiji Restoration, the Nanbu clan had much of its land confiscated, and in 1871, the heads of its branches were relieved of office. In the Meiji period, the former daimyō became part of the kazoku peerage, with Nanbu Toshiyuki receiving the title of hakushaku (Count). The main Nanbu line survives to the present day; Toshiaki Nanbu served as the chief priest of Yasukuni Shrine.