It was fairly well-known, as the war progressed, that Allied POW's were brutally mistreated by the Japanese. Japanese troops were also well-known for fake surrenders, where they would pretend to surrender, and then try to bushwhack the GI's who went to accept the surrender. As far as I'm concerned, the Japanese got less than they deserved (in terms of war casualties). At the same time, there's no comparison between the genocidal policies of the Nazis*, and the classic imperialistic bent of the Japanese.
* Where if being of the wrong ethnicity was fatal to you and your family, in spite of dedicated government or military service.
"At the same time, there's no comparison between the genocidal policies of the Nazis*, and the classic imperialistic bent of the Japanese"
There are a few parallels. The Japanese saw themselves as both the "big brother" to the rest of Asia and as the pinnacle of the human race - and they would brutalize anyone to prove it.
What is amazing is how sanitized this stuff is from the history books. I have heard stories of Japanese tourists going to Singapore and being absolutely shocked that they are treated rudely. They have been taught that the Japanese troops were greeted all across Asia as liberators of the victims of European exploiters.
the Japanese simply fought like Asians have always fought wars, all sorts of Asians, from Mongols to Caucasian Russians..