Are you serious? Poor Japan? Here are a couple of pictures of what the Japanese did to Chinese civilians in Nanking in 1937. Samurai were having contests to see who could chop off the most heads. Notice that is her baby she is holding.
25% of Allied POWs died in Japanese POW camps. 1% of Allied POWs died in Nazi POW camps. We did Japan a favor by dropping the Atom Bombs. If Japan was invaded to force it to surrender, another 10 million or so Japanese civilians would have died.