When Prince Oama arrived to Fuwano-seki checkpoint and gained the control of Mino Province and the eastern region, he divided his army into two groups which consisted of tens of thousands of soldiers; one was sent to Wa (Yamato Province) and the other was sent to Omi area.
不破関に入って美濃国と東国全般を勢力下におさめた大海人皇子は、7月2日に軍をそれぞれ数万の二手にわけ、一方を倭（大和国）に向かわせ、他方を近江国に投入した。