I'd just like to add another data point. As an American, I don't recall ever being taught anything in school about the atrocities Japan committed on the Chinese, etc. Perhaps I was just a poor student :) but it obviously was not a main focus. It wasn't until I met my wife who is Chinese that I learned about this and she could not believe I didn't know about it. Of course it's a big part of the history education there and why many Chinese still hold strong grudges towards Japanese.