Since Nakamaro was deeply trusted by Empress Koken and also he was tyrannical, Komaro was dissatified with it and tried to kill Nakamaro in a conspiracy with Hyobukyo (Minister of Military Affairs) TACHIBANA no Naramaro.
仲麻呂は孝謙天皇の信任厚く、専横であったため、古麻呂はこれに不満を持ち兵部卿橘奈良麻呂と結んで仲麻呂を除こうと画策した。