 In August Amago Haruhisa had gathered a force of 30,000 and departed Izumo Province, moving into the vicinity of Motonari's Yoshida-Koriyama Castle and establishing a headquarters nearby.Meanwhile, Mōri Motonari had evacuated over 5,000 of Yoshida's citizens inside the walls of Koriyama Castle.The castle itself was defended by around 3,000 soldiers, by which time urgent requests for aid were dispatched to the Ōuchi in Suo Province.