Japan tried to get peace negotiations months before Hiroshima.
They just tried it via the Soviets because USSR and Japan had an agreement not to attack each other. And Japan wanted no unconditional surrender. So there's that.
The USSR declared war on Japan right around the time of the bombings and attacked Japans chinese puppet state Manchukuo.
At this point Japan would have surrendered in any way.
The US wanted to keep the soviets out of the surrender, they wanted to demonstrate their new power...
Ever wondered how it actually came to the Korean War?
Wikipedia:
Basically another situation like in Germany. And something, the US did not want to happen in Japan as well.
That thing with a major invasion of the japanese mainland would have been a reason if Japan hadn't already tried to get peace negotiations.







