In addition, it is well known that SAKANOUE no Tamuramaro was appointed as Seii vice shogun on February 5, 794 as the adjutant for OTOMO no Otomaro, Seii taishogun (Seii great shogun, literally, "great general who subdues the barbarians") who was dispatched to conquer Ezo in Ou by the Imperial Court.
さらに延暦13年（794年）1月1日、朝廷が奥羽の蝦夷を征伐するために派遣した征夷大将軍大伴弟麻呂の副官として坂上田村麻呂を征夷副将軍に任じたのが有名である。