This castle ruin entered the annals of history in 1582 (Tensho 10), when Hashiba Hideyoshi (later Toyotomi Hideyoshi) inundated the castle using a water siege — diverting river water to flood the fortification. Taking advantage of the surrounding low-lying marshland, Hideyoshi constructed a dike stretching more than 5 kilometers in a matter of weeks to channel the Ashimori River and isolate the ca…

1582年、羽柴秀吉が水攻めを敢行。城主・清水宗治は船上で自刃。秀吉は本能寺の変を受けて中国大返しを行い、後の天下統一につなげた。国の史跡指定。