Meanwhile, Hideyoshi TOYOTOMI, who had brought his old enemy Ieyasu TOKUGAWA into subjection to ensure future security, decreed a large-scale mobilization order in February, 1587 for the Kyushu Conquest, and sent a large army of daimyo (Japanese feudal lords) from Kinai (the five capital provinces surrounding the ancient capitals of Nara and Kyoto), Chugoku and Shikoku regions to Kyushu.
一方、宿敵の徳川家康を臣従させて後顧の憂いを無くしていた豊臣秀吉は、天正15年（1587年）1月に九州征伐の大動員令を発し、畿内や中国・四国の諸大名による大軍を九州に送り出した。