However, an argument with Nagayori IKEDA, a younger brother of Nagayoshi, led to a sword fight, and in this fight, Yasutsune was killed and Yoshinobu also was seriously injured.
しかし長幸の弟・池田長頼と口論から刃傷事件に及んで安経は殺され、自分自身も重傷を負ってしまった。