In the capacity of Dai Shogun (the great general) for the Kyoto side, Hideyasu, along with his younger brother Hidezumi, fought against the shogunate army in Mino Province and near the Uji-gawa River but was defeated.
京方の大将軍として弟の秀澄とともに美濃国と宇治川で幕府軍と戦うが敗北。