Osumi-so

...The first time this site was mentioned as a temple land in an official decree dated December 3, 1158 (Hogen 3), later documents say that it was donated to Iwashimizu Hachimangu Shrine in the 10th century. In 1235 (Kasei 1), a dispute over water use arose between this site and Osumi Manor, a manor owned by Kofuku-ji Temple, located to the northwest of this site. As a result of Kofuku-ji Temple burning down 60 homes of the Iwashimizu Manor's residents and killing two Shinto priests of Iwashimizu Hachimangu Shrine, the dispute between the two manors expanded into a dispute between the two powerful families of Iwashimizu Hachimangu Shrine and Kofuku-ji Temple. Both sides pushed the portable shrine and sacred tree and made a strong appeal to the Imperial Court, and the incident escalated into a major dispute, but it was calmed down the following year when the Kamakura Shogunate finally tried to establish shugo and jito in Yamato Province.

*Some of the terminology that refers to "Osumi-so" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…保元3年(1158)12月3日の官宣旨に宮寺領として現れるのが史料上の初見であるが，後の史料によると薪薗は10世紀に石清水八幡宮に寄進されたという。1235年(嘉禎1)当荘の西北にある興福寺領大住（おおすみ）荘との間で用水相論が起こり，興福寺による薪荘在家（ざいけ）60宇の焼打ち，石清水八幡宮神人（じにん）2人の殺害の結果，両荘の相論は石清水八幡宮と興福寺の両権門（けんもん）間の相論に拡大した。両者ともに神輿･神木をおし立てて朝廷に強訴（ごうそ）する大相論に発展したこの事件は，翌年，鎌倉幕府がついに大和国に守護･地頭を設置しようとしたことにより，いったんは鎮静化する。…

※「大住荘」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