So, I knew a girl who went to a Japanese international school in my South East Asian home country where the Japanese did some utterly horrendous things during WWII. She told me the school took them to a war museum kinda place on a field trip and basically shouted at them like “LOOK AT WHAT YOUR PEOPLE DID!” until the whole room of grade school kids were crying about how sorry they were. So at least outside of Japan there seems to be some (perhaps over the top) education about the atrocities committed by the Japanese government to Japanese students, but I agree, most of the Japan educated Japanese people I’ve spoken to are just vaguely aware that they did some bad stuff before they got nuked.