Debate me on this.
Many senior military figures and politicians had already declared Japan as out of the game, Eisenhower himself said, when told by US Secretary for War Henry Stimson that nuclear weapons were to be used on Japan "I voiced to him my grave misgivings, first on the basis of my belief that Japan was already defeated and that dropping the bomb was completely unnecessary... Japan was at that very moment seeking some way to surrender with a minimum loss of face." Eisenhower, the guy with responsibility for creating the major war plans to defeat Japan, advised against dropping the bomb because in his opinion, Japan was already dead in the water!
Couple more quotes for you...
(US Strategic Bombing Survey 4, The Summary Report on the Pacific War.)
"It seems clear that, even without the atom bomb attacks, air supremacy over japan could have exerted sufficient pressure to bring unconditional surrender and obviate the need for invasion... Based on a detailed investigation of all the facts and supported by the testimony of the surviving Japanese leaders involved, it is the survey's opinion that certainly prior to December 31, 1945 Japan would have surrendered even if the atom bomb had not been dropped, even if Russia had not entered the war, and even if no invasion had been planned or contemplated."
.) "It wasn't necessary to hit them with that awful thing."
Pretty damning stuff.