Naganuma Munemasa

Naganuma Munemasa (1162–1240) was an early Kamakura-period warrior and gokenin, the second son of Oyama Masamitsu and founder of the Naganuma clan. He joined Minamoto no Yoritomo in 1180, campaigned against the Taira and the Northern Fujiwara of Ōshū, and received the Minamiaizu lands in 1189.

He supported the Hōjō and fought in the Jōkyū War of 1221, afterwards becoming shugo of Settsu and Awaji. In 1230 he passed the headship to his son Tokimune.