When the Chokyo Rebellion, an internal discord of the Uesugi family, started, the Nanasawa Fort fell by the invasion of Kanto Kanrei (a shogunal deputy for the Kanto region) Akisada UESUGI in 1488, and therefore, Tomomasa stayed in the Oba Fort (the present Fujisawa City) after that. |
上杉家同士の内訌である長享の乱が始まると、長享2年(1488年)に関東管領上杉顕定の侵攻を受けて七沢要害は陥落し、以後は大庭要害(現藤沢市)に拠った。 |