Kawachi Kan - Kawachi no Aya

...They are said to be descendants of Emperor Ling of the Later Han Dynasty, and are considered to be on a par with the Hata clan, which is said to be the descendants of Emperor Qin Shi Huang. They split into two branches, the Eastern Han (Wa-han) and the Western Han (Kawachi-han), and continued to exist as a large clan by adding the Imaki-no-ayahito who later came to Japan. The Eastern Han expanded its influence mainly in Takaichi District, Yamato Province, and by the 7th century, it had split into many clans with direct surnames, such as Sakanoue, Fumi, Tami, Ikebe, and Aratai, and was renamed Imiki in the eight-color surname system of Emperor Tenmu. In the 8th and 9th centuries, the Sakanoue clan took a leading role in the political world, and some clans were given the titles of Sukune and Osukune.

*Some of the terminology explanations that refer to "Kawachi Kan" are listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…後漢霊帝の子孫といい，秦始皇帝の裔という秦氏（はたうじ）とならび称せられる。東漢(倭漢)（やまとのあや）と西漢(河内漢)（かわちのあや）の両系にわかれ，その後に渡来した今来漢人(新漢人)（いまきのあやひと）を加え，巨大な氏族として存続した。東漢は，大和国高市郡を中心に勢力をひろげ，7世紀までに，坂上･書（ふみ）･民･池辺･荒田井など多くの直（あたい）姓氏族にわかれ，天武天皇の八色の姓（やくさのかばね）において忌寸（いみき）姓に改められ，8～9世紀には，坂上氏を中心に政界に地歩を占め，宿禰（すくね）･大宿禰を賜る氏もあらわれた。…

※「河内漢」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。

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