I've seen numerous interviews of men who were readying to invade the main island and they were overjoyed at the news. Prior to that, they ALL considered themselves as "dead men walking".
My grandfather was on the Bunker Hill when it got kamikazee’d during Okinawa. Never had to do much to convince him the bomb was a good thing.
My late father, at that time a Marine private who helped to take Okinawa, was one such man. He lived to the age of 77 instead of being killed in the invasion of the Japanese Home Islands.
My father considered every day of his life after d-day (Sept. 20?) as a gift from heaven. There turned out to be 60 years worth of days to be grateful for. He had done that beachhead thing three times and was already a fugitive from the law of averages. Also he was in an independent tank battalion, and they always got the dirty end of the stick.
And that includes Allied POWs, who I read somewhere, were dying at the rate of 1,000 per day. I use that figure when I run into those who said that the submarine war has choked off Japan's imports and they would have had to surrender "soon". They have no answer when I ask how many more thousand POWs must die while waiting for the collapse.
Then there's the story of a Jap diplomat who told an American that they surrendered because they didn't want any more bombs dropped. When told the Nagasaki bomb was our last, he said "If we'd known you had only two . . ." and then shut up, but the inference was clear they would have STILL held out.