Although this may not be immediately relevant, the Takeda force was psychologically pressured with few options and less time for decision-making, when Mt. Tobigasu was assaulted and their escape route was almost blocked.
間接的ではあるが、鳶ヶ巣山への攻撃により退路を脅かされたため、武田軍は意思決定の選択肢・時間が制限されて心理的に圧迫された。