Kasuga no Tsubone would become very angry when Iemitsu's parents were unkind to him, and she would scold them saying that Iemitsu might be sent to Sunpu (Shizuoka), adopted as Ieyasu's son and appointed to shogun.
家光を粗略に扱う秀忠夫妻に激怒し、家光を駿府に引き取って家康の養子にしてから三代将軍に就けると叱責した。