Prince Oama, who had raised an army in later July of the year of Jinshin (Mizunoe-Saru [one of the Oriental Zodiac]) (672), firstly went to Mino Province where he gathered troops of Togoku (the eastern provinces).
壬申の年（672年）の6月下旬に挙兵した大海人皇子は、まず美濃国に入って東国の兵を集めた。