Japan in no way surrendered because we dropped atomic bombs. We did more damage to them through our conventional bombing campaign, than the two atomic bombs did.
Their war council met and opted not to surrender after the first atomic bomb. And it had already decided to surrender before it could meet about the second bomb.
You are totally ignoring the real reason Japan surrendered. One minute after midnight August 9th, the Soviets invaded Japan's mainland territory and started slicing through it.
Japan was already extremely fearful of the Soviets since they go their butss kicked in the Battle of Khalkin Gol in 1939. They wanted no part of fighting against the Soviets and they certainly didn't want to surrender to the Soviets and have Japan under Soviet occupation. They were choosing which country would occupy them.
Why do you think the U.S. picked the days they did to drop atomic bombs? The USSR, by agreement with the Allies, had until 3 months after VE Day to declare war on Japan. So, we knew they were waiting until the last minute, and when it would happen.
Roosevelt and Churchill totally screwed the United States over, by allowing this. If the USSR wanted Allied assistance, they should have had to drop neutrality and declare war on Japan immediately.
Sorry, everything I said is accurate and backed up by my bibliography.