Japan got a much better deal than they ever expected, especially after we dropped a second bomb on them to reiterate “What part of UNCONDITIONAL surrender were you having a problem understanding?”.
Are you refering to the mass slaughter of little old ladies, babies in the crib in Nagasaki, also known as the heart of Japanese Christianity? In any case, the surrender was NOT unconditional. Even after the dropping of the second bomb, the Japanese insisted on the CONDITION that they could keep the emperor. Truman overrode the objections of his bitter-end New Deal advisors and agreed to this CONDITION. Sadly, he probably could have had this deal much earlier and avoided the the mass slaughter of innocents.