日本嘅北海道，喺舊陣時係叫作蝦夷（ ），日本嘅史書度有唔少關於蝦夷人嘅記載。喺日本武尊傳說成立嘅時代（6世紀），照返《日本書紀》嘅記載，日本武尊經由海路進入陸奧國（依家嘅本州東北地方）攻打東夷「日高見國」。徵討完咗，「蝦夷既平，自日高見國還之，西南歷常陸（依家嘅茨城縣東北方）」（轉引自沈淑敏 nd、日本書紀、尾張國熱田太神宮緣記）。由呢度可以睇到，蝦夷人嘅勢力範圍，係由茨城縣東北地區，去到成個本州東北地方。
Hokkaido in Japan was called Ezo ( ) in the old battle, and there are many records of bullying the Yi people in Japan's history books. In the 6th century, when the legend of Japan's Takezun was established, according to the "Japan Shoki", Japan's Takezun entered Mutsu Province (present-day northeastern Honshu) by sea and attacked the Toyi "Hitakami Province". After the conquest, "Ezo is both flat, and since Hidakankoku has returned to it, the southwest calendar Changlu (now northeast of Ibaraki Prefecture)" (quoted from Shen Shumin, Japan Shuki, Owari Province Atsuta Taijin Palace Aki). From here, we can see that the Ezo people's sphere of influence extends from the northeastern region of Ibaraki Prefecture to the entire northeastern part of Honshu.