Although the name of OKISOME no Oku isn't mentioned in the description of the Jinshin War in "Nihonshoki" (Chronicles of Japan), the proclamation about his theft explained below proves that he had made achievements supporting Prince Oama.
『日本書紀』の壬申の乱のくだりに置始大伯の名は現れないが、次に述べる窃盗事件の詔で、大海人皇子側で活躍したことがわかる。