Due to strenuous efforts of Nobushige SANADA and of Katsunaga MORI as well as inattention and bad cooperation among big forces, the Tokugawa forces met such a dangerous situation for a while that the Uma-jirushi (massive flags used in Japan to identify a daimyo or equally important military commander on the field of battle) of Ieyasu TOKUGAWA fell and Ieyasu himself made his mind to kill himself.
徳川軍は大軍ゆえの油断や連携の拙さ、真田信繁や毛利勝永らの奮闘もあって、一時は徳川家康の馬印が倒れ、家康自身も自決を覚悟するほどの危機にも見舞われた。