The other party Nobunaga also had an idea of forming an alliance with Ieyasu for reasons of his being at war with the Saito clan of Mino Province and his need to have a countermeasure to keep movements of Ujiyasu HOJO of Kanto region and Shingen TAKEDA of Kai Province in check; therefore, Nobunaga himself already had ordered Nobumoto MIZUNO, who was Ieyasu's maternal uncle, and others.
一方の信長も、美濃国の斎藤氏と交戦している経緯、そして関東の北条氏康や甲斐国の武田信玄に対する抑えへの対抗策から家康との同盟を考えており、家康の母方の伯父に当たる水野信元らに交渉を命じていた。