Lifespan: Unknown to 12/3 of Tenshō 5 (1578)
Rank: bushō
Title: Vice Minister of Imperial Archives
Clan: Shichijō-Akamatsu
Father: Akamatsu Masamoto
Siblings: Masamitsu, Masanori, Masanao, Masashige, Yokoyama Yoshisuke, sister (wife of Fukuhara Norihisa)
Children: Masamune