On the way, he watched for the movement of the Ukita clan in Kameyama-jo Castle, also known as Numa-jo Castle, now Higashi Ward, Okayama City, where the Ukita clan had once resided, making sure that the Ukita clan would take sides with the Oda forces, and entered into Bitchu with 30,000-strong troops, with the addition of Ukita's 10,000 soldiers.
途中、宇喜多氏のかつての居城であった亀山城（別名：沼城、ぬまじょう）（現：岡山市東区(岡山市)）で宇喜多氏の動向を探り、宇喜多氏が織田軍に味方することを確認、宇喜多勢1万を加えて総勢3万の軍勢で備中へ入る。