It is told that after Toramasa commit suicide by disembowelment (Seppuku) being implicated in the Yoshinobu Incident in 1565, Toramasa's troop was taken over by Masakage YAMAGATA who is considered his own younger brother (or nephew according to another resource), and so was his Akazonea at the same time.
永禄8年（1565年）に虎昌が義信事件に連座し切腹すると、虎昌の部隊は彼の実弟（甥とも）とされる山県昌景が引継ぎ、同時に赤備えも継承したという。