It’s funny the different response of Germany compared to Japan. As you say, Germany is perpetually making amends while Japan mostly denies anything happened.
I'll have to look up the exact statistics, but in the 1950s when the Army and US Government reviewed the occupation of both Germany and Japan, approximately 3% of the German population had been involved in some form of "de-nazification" from being charged or executed, to something much less serious like being denied political or government office.
The similar figure for Japan was 0.2%.
Germany “Atoned” for The Holocaust by shipping in millions of Muslims, who hate Jews even more than the Nazis did.