In 1548 after he made peace with Dosan SAITO, daimyo of the Mino Province during the Sengoku period, who was fighting with his father Nobuhide, he got married with the daughter of Dosan, Nohime, for political reasons.
天文17年（1548年）、父・信秀と敵対していた美濃国の戦国大名・斎藤道三との和睦が成立すると、道三の娘・濃姫と政略結婚した。