Here’s another account of what an invasion of Japan would likely have looked like:
http://www.webwizpro.com/1945InvasionofJapan.html
Would have made Verdun, the Somme and “The Russian Front”, combined, look like a mild dispute in a convent.
I would not go that far.
But, back around the time of the Gulf War, I read that the Pentagon was still trying to use up the Purple Hearts that it had stockpiled for Operation Olympic. The story said the Pentagon had purchased Purple Heart ribbons since WWII, but that Korea, Vietnam, smaller conflicts, ex post facto awards and replacements of lost medals had not exhausted the Purple Hearts it purchased in anticipation of the casualties that would be taken just in the invasion of Kyushu.