Japan committed the rape of nanking, experimented on prisoners unit 731, Bombed Chonquing killed 5K chinese civilians.
https://ww2db.com/battle_spec.php?battle_id=281
You are also expecting the US bomb like today, magically transforming ww2 weapons into the precision we have today.
War sucks, but pretending that nazi's , and the racist japanese ww2 military were innocent is even worse.