During the Siege of Odawara led by Hideyoshi, Masamune made an excuse for his delay in joining the battle, stating that he was "so busy with the management" of Oshu, especially the territory of Ashina clan that he newly acquired.
秀吉の小田原の役のとき、参陣に遅延したのは、奥州、特に新たに手に入れた芦名家領土の「経略多端」の故と弁明している。