Mr. Aihara

...There are various branches of samurai who were active in the Middle Ages. (1) A clan of the Yokoyama clan of the Seven Musashi clans. Also written as Aihara. In the Wada War of 1213 (Kenpo 1), they sided with the Wada side and were killed, including Awaihara Taro. The Awaihara clan, who later appeared as vassals of the Hojo Tokuso family, are said to be descendants of the same clan who survived the Wada War. (2) The Chiba clan of the Kanmu Heishi clan. The direct trigger for the Wada War was the revelation of a treason by Wada Yoshitane (Yoshimori's younger brother) and others, and at that time a vassal of Chiba no Suke named Awaihara Jiro captured Anenbo, who had a palindrome of treason, thus opening the door to the revelation of the treason. ...

*Some of the terminology that refers to the "Aibara clan" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…中世に活躍した武家で諸流がある。(1)武蔵七党横山党の一族。藍原とも書く。1213年(建保1)の和田合戦に和田方にくみして粟飯原太郎以下が討死。のち北条得宗家の被官としてみえる粟飯原氏は，この和田合戦に生き残った同氏の後裔であるという。(2)桓武平氏千葉氏族。前記の和田合戦の直接の契機となったのは，和田義胤(義盛の弟)らによる謀反露顕事件であったが，このとき千葉介被官粟飯原次郎なる者が謀反の回文を持った阿念房を捕らえて謀反露顕の端緒をひらいている。…

※「藍原氏」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