[8] Motonobu decided that he should break the siege and giving a party with his remaining soldiers at night before they goes out to try launch assault against Ieyasu's blockade.

However, as they launched the attack towards Mitsuiyama, Yasumichi immediately reinforced by Ōkubo Tadayo and Osuga Yasutaka, and resulted in a fierce battle, where Motonobu killed.

Meanwhile, as the battle has phased with the army of Motonobu routed, Ōkubo Tadataka led a detachment to pursue any of fleeing enemies.

[9] This siege was quite an advantageous event for Oda Nobunaga, as it weakened his enemies; the battle of Tenmokuzan the following year would come to be known as Takeda Katsuyori's last stand.

According to the source “Shinchô kôki” in all 688 soldiers of various rank joined the commander of the castle in a desperate attack out onto the besiegers, and they were killed.