Empress Kōken
In 764, Fujiwara no Nakamaro rebelled, and Nagate supported the side of Empress Kōken and Dōkyō. He was promoted to and "dainagon" and conferred honors, second-class. After Dōkyō established his power, and after Toyonari's death in 765, Nagate held his position as the most powerful "kugyō" in the "daijō-kan" until his death. In 766 he was promoted to "udaijin" and then "sadaijin", and obtained the rank of .