Nobutsuna was the adopted son-in-law of Naoe Kagetsuna and succeeded him in 1577. Lord of Yoita castle, he supported Uesugi Kagekatsu in the 1578-79 Ôtate no ran. However, in 1581 he was killed by Yasuda Hidehiro at Kasugayama castle. As Nobutsuna had no sons, Kagekatsu ordered that his widow marry Higuchi Kagetsugu, who became the head of the Naoe (as Naoe Kanetsugu).
- Initial text from Sengoku Biographical Dictionary (Samurai-Archives.com) FWSeal & CEWest, 2005