Chinese atrocities in Tibet were part of greater atrocities comitted by Mao and his gangstas... in which dozens of millions of chinese lost their lives, so this comparison isn't right.
Japanese war crimes are fruits of samurai nationalism. Only non-japs were dying becouse of that - while becouse of Mao both Tibetans and Chinese died.
BTW in Germany today, no one pull nationalist bull**** into school textbooks while in Japan old nationalism didn't die as we are witnessing today. And yet USA are backing Japan's membership in Security Council, not Germany's!