If the Allies had invaded Japan on November 1, 1945, as originally planned, it would have been one of the bloodiest battles of World War II
The Allies bombed the living crap out of them.
If you could go back in time and somehow stop the bombing of Dresden, and save all of the innocent people who died, but at the price of having Hitler exterminate every Jew, African (American and otherwise) every Gypsy, gay person, and Muslim in Europe, and possibly the world, would you do it?
Japan had endured massive conventional bombing of all their major cities that had war factories, and the God Emperor showed no signs of surrendering.
If the Allies had invaded Japan on November 1, 1945, as originally planned, it would have been one of the bloodiest battles of World War II, with millions of deaths. The Allies assembled a larger naval armada than ever, including 42 aircraft carriers, 24 battleships, and 400 destroyers. However, the Japanese had been preparing for the invasion, with deeper bunkers, more tunnels, and more supplies. The Japanese had also demonstrated that they would rather die than surrender.
Had the invasions occurred, they would have been the most savage battles of the war. Thousands of young U.S. military men and perhaps millions of Japanese soldiers and civilians would have died.