The main issue was for them to detonate in US soil.
japan surrendered
If you are referring to WW2, then the US stopped using atomic bombs on Japan because Japan agreed to surrender. Had they not, the US had plans and production setup to drop a total of 23 atomic bombs on Japan in 1945.
Japan bombed Hawaii. (pearl harbor)
By B-29 Superfortresses using Norden Bombsight.
End WW2, ASAP.
A written warning to Japan with options.
To end the war and to collapse Japan's means to make war.
To end the war ASAP!
The decision was the President's. He stated that he wanted to put an end to Japan's capacity to go to war.
He stated that he wanted to end the war and collapse Japan's means to make war.
I think the only good reason was to bring the war to an end.
Saving the lives of the soldiers (mostly marines) needed to invade Japan.