Chief of the Barbarians

...In ancient Japan, this refers to Emishi (Ezo or Emishi) who were captured or surrendered and placed under state control. They were also called Ezo-fu. The ancient state's ultimate goal in managing the Emishi was to organize the Emishi, a resistant people who stood outside state control, and their territories into state control and to make them part of the "internal people" and "internal country." The problem of these "internal Emishi" as prisoners of war represented the final form of the Emishi management problem. The oldest story is that the captured Emishi were sent to the Imperial Court and organized into a military group of the Yamato Imperial Court called the Saekibe. ...

*Some of the terminology explanations that refer to the "Chief of the Barbarians" are listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…日本古代において，捕虜になるか降伏して国家支配下に置かれた蝦夷（えぞ∥えみし）をいう。夷俘とも称された。古代国家は国家支配の外に立つ蝦夷という抵抗民たちとその領土とを，国家支配の中に組織して，これを〈内民〉〈内国〉に同ずることを蝦夷経営の最終目標にしていた。この〈内なる蝦夷〉としての俘囚の問題は，蝦夷経営問題の最終形態を示していたことになる。最も古く，捕虜になった蝦夷は朝廷に送られ，佐伯部という大和朝廷武力集団に組織されたという伝えがある。…

※「夷俘の長」について言及している用語解説の一部を掲載しています。

出典｜株式会社平凡社世界大百科事典 第２版について | 情報