Having realized at the river that Shigeyasu was killed in the morning and that an army had been sent to attack him, he chose to stand and fight the army as a samurai, rather than retreat to the castle.
今朝重保が殺された事、自分に追討軍が差し向けられた事を二俣川で初めて知った重忠は、館へ退くことはせず潔く戦う事が武士の本懐であるとして討伐軍を迎え撃つ決断を下す。