Nohime adopted Nobunaga's legitimate son Nobutada, and it is believed that Nohime went ahead to adopt Nobutada because if the child of Nohime, who was linked by blood to the Saito and Toki clans, was the legitimate son of Nobunaga, Mino Province could have been ruled more smoothly and the authenticity of the heir could be emphasized on top of the letter from Dosan which named Nobunaga as successor of Mino Province.
信長嫡男の信忠は濃姫が養子にしているが、濃姫があえて信忠を養子に迎えた理由として道三の国譲状により信長の美濃支配の正当性はあるものの、斎藤氏、土岐氏の血を引く濃姫の子供が信長の嫡男であればより円滑な美濃支配と後継者の正統性を強調できるためではないかと思われる。