The IJN hit Alaska, Brookings Oregon, Santa Barbara California, Darwin Australia, India and as far as Madagascar off the coast of Africa. This doesn't count China nor Russia.
the nationality of the Japanese did not change after the war. maybe the question requires rephrasing??? Korea which had been a Japanese protectorate in 1905 and directly under Japanese rule in 1910...
The United States led the assault on the Japanese and German aggression in the world. We were part of the union of the free world that destroyed both the Japanese and Germans during WW2