柏市
Toward the end of 1941, Ogawa was sent to Manchuria to fly with the 70th Sentai, a fighter wing outfitted with the Nakajima Ki-44 "Shōki", called "Tojo" by the Allies. He flew for three years and gained a high level of skill in piloting fighters. By then, American heavy bombers had begun to bomb Japan itself, so to counter the attacks the 70th Sentai was transferred, in November 1944, to Kashiwa, Chiba, northeast of Tokyo. For this task, the fighter pilots were given newer 20 mm Ho-5 cannon-equipped Nakajima Ki-84 machines, called "Frank" by the Allies.