Kasuya clan

...Also written as Kasuya or Kasuya. A medieval samurai family whose main territory was Kasuya-sho in Sagami Province. According to the family tree in the "Zoku Gunsho Ruiju," the family was born in Kasuya-sho by Fujiwara Yoshikata's son Motokata, who had been sent down to the country as the "Province of Sagami Province," and took the name Kasuya Taro, but the authenticity of this is unclear. Motokata's son Morisue was called Kasuya-shoji, and Morisue's grandson Morihisa was called Kasuya Gonnokami, so the Kasuya clan was both the official of Kasuya-sho and also had ties to the provincial government. Morihisa joined the Heike side when Minamoto no Yoritomo raised his army in 1180 (Jisho 4), and his son Arisue is seen in the army to pursue the Heike in 1184 (Genryaku 1), so it can be assumed that the Kasuya clan was added to the ranks of Kamakura vassals by this time. ...

*Some of the terminology explanations that refer to the "Kasuya clan" are listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…粕谷，粕屋とも書く。相模国糟屋荘を本領とする中世の武家。《続群書類従》所収の系図によれば，〈相州の守護〉として下向した藤原良方の子元方が糟屋荘に生まれ糟屋太郎を名のったのが始まりというが，真偽のほどは不明。元方の子盛季は糟屋荘司，盛季の孫盛久は糟屋権守と称しているから，糟屋氏は糟屋荘の荘官であると同時に国衙とも関係を持っていたと考えられる。盛久は1180年(治承4)の源頼朝挙兵時に平家方に加わったが，その子有季が84年(元暦1)の平家追討軍中にみえるので，糟屋氏はこのころまでに鎌倉御家人の列に加えられたとみてよい。…

※「粕屋氏」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