There was no genocide in China either. It was just raw killing. Just killing for the sake of killing. Killing for fun. For entertainment. Killing out of boredom. Killing because there was an endless supply of targets and guinea pigs. If it was systemic, far more Chinese would've died. Not sure if you've been in the military but once you get a taste for death, it is very easy to do it again, unfortunately. It becomes 2nd nature and you lose the human connection with the victims. Ironically, while the Japanese were killing Chinese, they were rescuing Jews from Nazi camps and Russia.
No denial about Nazi eugenics? Who is not denying it? Has anyone actually been asked about it? Any politicians since you guys like to use politicians as a litmus test of whether an entire nation is "in denial"? Why don't you go and ask you local politician that, on the record, of course, and see what his answer is. I'd love to see the recording. There is no doubt in my mind that they would deny it just like many like to accuse the Japanese of denying "genocide" in China or elsewhere.
Also, anyone can read up on Japan's actions in China in Japan today. The Japanese does not forbid its people from accessing such information, unlike Communist China. The irony is that, just like in America with the eugenics movement, the average Japanese will know little and be surprised at the extent to which his country played in the deaths of others. They will not be in denial. It is usually only the politicians that are in denial.
Finally, you may not place the same blame on the minds behind a human tragedy but they are just as culpable as those who followed their instructions. Don't pretend that is not the case.