According to the "Mikawa Go Fudoki" (The Topographical Records of Mikawa Province), "Because Hideyoshi planned to assign Hidemasa as guardian of Oshu (Northern Honshu, the region encompassing Mutsu and Dewa Provinces) after suppression of Oshu is completed, so it is natural that Hideyoshi deeply regrets Hidemasa's sudden death."
『三河後風土記』には、「今度奥州まで平均なしなば、此人をもって奥州の藩鎮たらしめんと、殿下はかねがねはかり給ふところ、かく俄かなる事なれば、歎かせ給ふもことわりなり。」とある。