Etsu (King) - Etsu

...They also played a part in the slave trade through wars with the smaller countries around them. The Nupe kings are called Etsu, and their origins are said to date back to around 1530. According to their oral traditions, before that time the Nupe were not unified, were weak, and were subordinate to the Igala kingdom in the south, and were its tributary state.

※Some of the terminology that mentions "Etsu (King)" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…また周囲の小国との戦争を通じて，奴隷交易の一翼をも担っていた。　ヌペの王はエツEtsuと呼ばれるが，その起源は1530年ころとされている。彼らの口頭伝承によれば，それ以前のヌペは統一されておらず，弱少で，南方のイガラの王国に従属し，その朝貢国になっていた。…

※「エツ（王）」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