When Soun was thought to be a ronin, Kitagawa-dono was said to be Yoshitada's mistress; however, the Ise and Imagawa clans were of equivalent rank and so recently, the theory has been revised to state that Kitagawa-dono was Yoshitada's legal wife, not his mistress.
早雲が素浪人とされていた頃は北川殿は側室であろうとされていたが、備中伊勢氏は今川氏と家格的に遜色なく、近年では正室であると見られている。