The problem is that after WW2, though there was a brief period comparable to the denazification in Germany, the old elites mainly big traditional business leaders, the Zaibatsu, and bureaucrats) were put back into power after the Korean war started. These elites, through the Liberal Democratic Party LDP, have been running the country more or less continiously for the last 60 years and have been censoring Japanese schoolbooks to play down their role in the atrocities of WW2 and before. Even today there are many young Japanese shocked if they get confronted with the true history of WW2. A few Japanese, who were in favour of accepting the guilt, like theformer mayor of Nagasaki, were threatened, or in the case of this mayor, gunned down by a right wing Yakuza gangster.
Another thing is, that while inner Japanese opposition was persecuted and incarcerated by the Though Police (mostly Communists) in the early years of the Japanese military dictatorship prior to WW2, there was (unlike Germany and Italy) very little political emigration.
In Germany, on the other hand, there was a pool of highly motivated emigrants available, who spent the war in Allied countries, often fighting as Allied soldiers, who were able to take over key posts. Japan never had a figure like the German ex chancellor Willy Brandt, who´s kneefall in Warsaw was credible, because he fought on the Allied side himself.
Je Suis Charlie et je suis Ahmet aussi