Since the Nanbu clan could not subdue Masazane, Hideyoshi sent a military force of 60,000 soldiers, with Ujisato GAMO and Mitsunari ISHIDA and others as their leaders, to the remote rural areas in Oshu (Northern Honshu, the region encompassing the Mutsu and Dewa provinces).
南部氏は自力での討伐をできず、秀吉は蒲生氏郷・石田三成らを大将に6万人の軍勢を奥州の僻地に派遣している。