Meanwhile, Japan downplays their war crimes or atrocities depending on who you ask, that is even if you confronted them about their dark past. Yasukuni Jinja even memorializes: A級戦犯 (WAR CRIMINALS) including Hideki Tojo labeling him a martyr – yes, you heard that right: considering them as war heroes when they're really the villains, that is the key reason why it's so controversial.
Japan is brutal during the war, as they literally have zero mercy towards Allied POWs or those they imprisoned. A Japanese commander even endorsed human experimentation in a labratory (Unit 731) where both Chinese citizens and some Allied POWs were subjected to torture, plus Japan at the time is not an signatory to the Geneva convention. (It's not even mentioned in Japanese history books.)