Considering the situation in which the Oda family expanded its power so rapidly that the power gap between it and the Takeda family was widening each day, the latter in any case had to deal a decisive blow to the former in a major battle as soon as possible.
また、織田家の勢力の伸張は急速であり、日に日に国力差が開いていく現状を鑑みれば、どのみち早い段階で織田家と主力決戦を行い決定打を与える必要があった。