Naganuma clan

Japanese: 長沼氏 - ながぬまうじ

A local feudal lord in Shimotsuke during the Middle Ages. His ancestor was Munemasa, the son of Koyama Masamitsu. Along with Asamasa (Koyama) and Asamitsu (Yuki), Munemasa was one of the three Koyama brothers, and during the Jisho-Juei civil war, he defeated Shida Yoshihiro at the Battle of Noginomiya in Shimotsuke along with Asamasa, and distinguished himself in the pursuit of the Taira clan and the Fujiwara clan of Oshu. In 1213 (Kenpo 1), when rumors spread that the monk Shigeyoshi, the son of Hatakeyama Shigetada, was plotting a rebellion at the foot of Mount Nikko, Munemasa disobeyed orders to arrest him and killed him, incurring the wrath of Shogun Minamoto no Sanetomo. Due to his military achievements during the Jokyu War, he was appointed Shugo of Awaji, and the Ota Bunmei of Awaji Province was created two years later.

Source: Heibonsha World Encyclopedia, 2nd Edition Information

Japanese:

中世，下野の在地領主。小山政光の子宗政を祖とする。宗政は，朝政(小山)，朝光(結城)とともに小山三兄弟の一人で，治承･寿永の内乱期には，朝政とともに志田義広を下野野木宮（のぎのみや）合戦に破り，平氏や奥州藤原氏追討に戦功を立てた。1213年(建保1)には，畠山重忠の子の僧重慶が日光山麓で反乱を企てるとの風聞が立つと，逮捕の命に背いてこれを誅殺し，将軍源実朝の怒りを買った。承久の乱では戦功があり，淡路の守護に任命され，この翌々年淡路国大田文が作成されている。

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

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