Chison, the spearhead commander of the Omi side troops, set a trap at the Seta bridge by cutting off in the middle of the bridge by around 9 m, placing long wood boards with ropes to pull when enemy solders walk over so that they would fall off the bridge.
近江方の先鋒の将智尊は橋の中ほどを3丈にわたって切断し、そこに長い板をかけて綱をつけ、敵が渡ると綱を引いて落下させるという仕掛けを作って待ち受けた。