I am a student of the Holocaust, having studied the details all of my adult life. Although the Japanese were every bit as brutal and vicious, I can not forgive the Germans for what they did in WW2. While I am sure that the Nazis are gone, and will not rise again, I have "zero" desire to tour Germany.
As for the Japanese, I have been heavily exposed to them for decades, having lived in Vegas, which is a Mecca for Japanese. They always seem so polite, and respectful. Their brutality to allied prisoners were MUCH worse than the Germans, but, there was a very clear dividing line in WW2 between the population, which was trained in total obedience, and the military, which ruled Japan. When I deal with the Japanese, I wonder what they are really thinking. With the German's, I don't even want to know.