Naganuma

The Naganuma were a branch of the Oyama family, named for their estate in Shimotsuke Province. During the Northern and Southern Courts wars, Naganuma Hidenao moved to the family's Nagae holdings in Mutsu Province.

His son Yoshihide gained recognition of his claim to Naganuma estate in 1399 and returned with Kamakura's backing, displacing the Shimotsuke branch. The main line was later driven out or destroyed in the Kyōtoku War. Another branch took the name Minagawa; in the 1590 Odawara campaign, Minagawa Hiroteru submitted to Tokugawa Ieyasu and secured his lands.