According to a commonly accepted view, Yoshisue is considered as the same person as a gokenin (immediate vassal of the shogun) called Saburo Yoshihide TOKUGAWA, whose name was found in the history book "Azuma-kagami" of the Kamakura bakufu (Japanese feudal government headed by a shogun).
また通説では、鎌倉幕府の史書『吾妻鏡』にその名が見出される得河義秀（とくがわさぶろうよしひで）なる御家人と同一人物と見なされる。