In January, 737, Azumahito, who was in the position of Mutsu no Azechi (Inspector of Mutsu) and Chinju Shogun (Commander-in-Chief of the Defense) and had been managing Ezochi (inhabited area of Ainu) for a long time, asked permission to straighten the route from Mutsu Province to Dewanoki (the Dewa Castle) by subduing Okachi Village.
天平9年（737年）正月、陸奥按察使兼鎮守将軍の任にあり長らく蝦夷地の経営にあたっていた東人は、陸奥国から出羽柵への経路にある男勝村を征して直路を通じさせる許可を朝廷に申請した。