It actually saved Japanese lives, considering their casualties would have been massive given a US land invasion of Japan.
Another fact that is glossed over, is that had the war dragged on, the Soviets would have been involved, and Japan would have wound up being divided, just like Germany and Korea, and it would have been another Cold War hotspot.
If memory serves me, Russia declared war on Japan with a few days left before the peace treaty was signed aboard the U.S.S. Missouri.
Japan had been pretty bad to anything in Asia for decades prior to WWII.
Probably a good thing for Japan that China, Russia and the U.S. didn’t team up to invade and kick their butts.