《日本書紀》入邊，就係咁記載蝦夷嘅：「朕聞：其東夷也，識性強暴，凌犯為宗。村之無長，邑之勿首。各貪封界，並相盜略。亦山有邪神，郊有姦鬼。……其東夷之中，蝦夷是尤強焉。男女相居，父子無別。冬則宿穴，夏則住樔。衣毛飲血，昆弟相疑。……故往古以來，未染王化。……即巧言而調暴神，振武以攘姦鬼。」「東夷之中，有日高見國。其國人，男女並椎結文身，為人勇悍。是總曰蝦夷。亦土地沃壤而曠之，擊可取之。」（轉引自沈淑敏 nd、日本書紀）
In the "Japan Shoki", this is how Ezo is recorded: "Hearsay: Its Dongyi is also intellectual, and Ling is a criminal. There is no long village, and there is no head in the city. Each is greedy and sealed, and steals from each other. There are evil gods in the mountains, and there are traitors in the suburbs. …… Among its eastern Yi, Ezo is particularly strong. Men and women live together, and there is no difference between father and son. In winter, they stay in the cave, and in summer, they live in the dead. Yimao drinks blood, and Kundi is suspicious. …… Therefore, since ancient times, it has not been dyed into kings. …… That is, clever words and temper the violent gods, and vibrate the martial arts to smash the traitors. "In the midst of Dongyi, one day Gao Jianguo. Its countrymen, men and women, tattooed together, are brave. It is always called Ezo. The land is also fertile and open, and it is advisable to strike. (quoted in Shen Shumin, Japan Shuki)