 In response, Masamoto, together with Ashikaga Yoshitaka, ordered Ōtomo Chikaharu, Ōuchi Takahiro, Shōni Sukemoto (the third son of Masasuke), Kikuchi Takeyuki, and Aso Korenaga to attack Yoshioki, and obtained a written edict from Emperor Gokashiwabara to defeat Yoshioki.This made Yoshioki an enemy of the Court, whereupon directives were sent out by Yoshitaka, the "shōgun", and his "bugyōnin" to a total of twenty-eight "daimyō" and powerful "kokujin" in the western provinces.In 1501, forces under the command of Ōtomo Chikaharu and Shōni Sukemoto attacked the stronghold of Umagatake Castle in Buzen Province.