Nanbu Masayuki

Nanbu Masayuki (1328–1388) was the twelfth head of the Sannohe Nanbu clan of Mutsu province, succeeding his father Nobunaga, the eleventh head. A weak lord, he saw kinsmen usurp his estates. After the Kamakura shogunate fell he at first sided with the Southern Court, then dominant in Oshu under Kitabatake Akiie.

One account says that in 1346 he accepted Ashikaga Takauji's overtures and joined the Northern Court, fighting Southern Court forces in Oshu to expand his power. He died in 1388 aged sixty-one, and his son Moroyuki succeeded.