However, this view is often denied because there are some historical materials advocating the ambition of Masamune (the theory stating that Masamune had plotted a scheme to overthrow the Tokugawa Shogunate and put his son-in-law, Tadateru MATSUDAIRA in the position of shogun).
しかし、この説は、政宗の野望説を唱える史料（政宗は徳川幕府を倒し、婿の松平忠輝を将軍職に就ける構想を立てていたとするもの）などから否定されることも多い。