In contrast to the conventional theory, some argue that the reason for the loss of his Ashimori territory was his aunt's, Kita no Mandokoro's (Kodaiin) support of the West forces in the Battle of Sekigahara.
足守領改易の背景には、通説と異なり、北政所（高台院）が関ヶ原の戦いで西軍を支持したことが原因とされる。