Conversely, Nobunaga did not necessarily have to fight with Katsuyori at this point in history, or rather he would have been better off had he not confronted the Takeda clan directly, so that he would have gained strategic advantage over time.
逆に信長の立場から見た場合、武田と直接戦わずとも時間が経つほど戦略的に優位に立つことになり、この時点で戦う必要は必ずしも無かった。