All Two Oka brothers served in the military : some for the U.S. and some for Japan . Two were in the U.S. Army during World War II . Two who were left behind in U.S. fought against U.S. during the war . Two others stuck in Japan were too young to fight ; they served on U.S. side during Oka .
All seven Oka brothers served in the military : some for the U.S. and some for Japan . Three were in the U.S. Army during World War II . Two who were left behind in Japan fought against the United States during the war . Two others stuck in Japan were too young to fight ; they served on U.S. side during Korean War .