In other words, the clash between them was inevitable for the following reasons, according to this view: For Shingen with the tripartite alliance among Kai Province, Sagami Province and Suruga Province as a major premise, it was inevitable to confront Kenshin who was an enemy of the Gohojo clan (later, Shingen stormed Suruga Province, breaking the tripartite alliance, but was isolated and was placed in a serious military situation), and even for Kenshin, not only the Takanashi family but also the Echigo Province constituting his base might have been placed in a dangerous state if he allowed Shingen to take the northern Shinano area easily.
すなわち、甲相駿三国同盟が戦略の大前提であった信玄にとって、後北条氏の敵対者であった謙信との対決は必然であり（後に三国同盟を破棄して駿河国へ乱入した信玄は孤立して厳しい戦略状況に陥っている）、謙信にとっても信玄の北信濃領有を易々と許せば、高梨家のみならず本国の越後国自体が危機に陥りかねないことから、両者の衝突は必然であったとするものである。