[PapaBear3625]

By Spring, 1945 the Japanese Navy had been pretty much destroyed and the Allies controlled the Pacific. They wouldn’t have had any means to fly a bomber to the United States.

They wouldn't need a bomber. Load it into a sub and try to make it into San Francisco Bay or the port of Los Angeles on a day when the prevailing winds are blowing east to maximize fallout on the city.

[wagglebee]

Early in the War that might have been possible, by 1943 or possibly early 1944 it would have been nearly inpossible for a Japanese sub to make it to the West Coast.

I just don’t think the Germans would have given an atomic bomb to the Japanese. The Nazis didn’t like the Japanese and they would have had a much better chance of bombing London or Moscow.