After the downfall of the Taira clan at the Battle of Dannoura, Tadafusa was pursued by MINAMOTO no Yoritomo but the remnants of the Taira clan including Muneshige and TAIRA no Kagekiyo banded around Tadafusa and mounted a do-or-die resistance in which it is said that they hold the castle for three months.
壇ノ浦の戦いで平家一門が滅亡した後、源頼朝による追討を受けるも、宗重や平景清ら平家の残党が忠房の元に集い、3ヶ月の篭城という徹底抗戦する。