(It is speculated that the Soga clan became one of the noble families from which the Emperor's wives were chosen by virtue of their blood ties and the fact that Umako's primary residence (Ubusuna) was in Katsuragi-ken, and Iname's wife was also from Katsuragi.)
（馬子の本居（ウブスナ）が葛城県だったことから、稲目の妻は葛城氏の出で、その血統に連なることにより、天皇へ妃を輩出出来る一族に連なったとする説もある）。