Lifespan: Bunan 3 (1446) (?) to 7/14 of Meiō 3 (1494)
Other Names: Nakano Mitsuji → Mogami Mitsuuji
Rank: sengoku daimyō
Title: Vice Minister of Civil Affairs
Bakufu: Muromachi – Commissioner of Dewa
Father: Nakano Mitsumoto
Adoptive Father: Mogami Yoshiaki
Siblings: Mitsuuji, Nakano Yoshimori
Children: Yoshiatsu, daughter (wife of Kaminoyama Shimotsuke-no-kami), daughter (wife of Yatsunuma Hidari-no-uma)
Mogami Mitsuuji served as a sengoku daimyō during the late Muromachi and early Sengoku periods. He was the seventh head of the Mogami clan and Commissioner of Dewa for the Muromachi bakufu.
Mitsuuji was born as the son of Nakano Mitsumoto. Mitsuuji served as the first head of the Dewa-Nakano clan and the lord of Nakano Castle in Yamagata in Dewa.
Under another theory, he was the son of Mogami Yoshiaki, a shugo daimyō and the sixth head of the Mogami clan. In either case, Yoshiaki did not have a son so, in 1479, Mitsuuji succeeded him as the seventh head of the main branch of the Mogami clan.
In 1479 and 1480, a retainer of Date Shigemune named Koori Harima-no-kami attached the Sagae clan, but was killed at the Battle of Shōbunuma. Through the assistance of Mitsuji, Harima-no-kami’s son constructed the Matsuzō Temple in the mountains overlooking the battlefield to worship his fallen father.
In 1494, Mitsuuji died and was succeeded by his eldest son, Mogami Yoshiatsu.