The conquest of the Emishi carried out by the Imperial Court (Kansai) in the ninth century was discontinued in what is now the area of the mid-Iwate and Akita prefectures.
9世紀に蝦夷に対する朝廷（関西）からの征服活動は、現在の岩手県と秋田県のそれぞれ中部で停止した。