During FUJIWARA no Nakamaro's Revolt in 764, Mushimaro served under Nakamaro's son FUJIWARA no Kokachi as Echizen no suke (assistant governor of Echizen Province), and was stripped of his rank and position after being implicated in Nakamaro's revolt, but was restored to his original rank in 766.
764年の藤原仲麻呂の乱のとき、仲麻呂の子藤原辛加知の下で越前介で、連座して官位を剥奪されたが、766年に元の位に復帰した。