At school in the 50s and 60s we devoured War Picture Library comics, and read literature on the horrors of Nazi concentration camps and Japanese POW camps. In China and Korea they still actively teach such things to their children, using live b&w contemporary film for example, so it is very much alive in their minds.
No, such things should never be forgotten, and even better perhaps, should never be repeated by anyone.
In Japan, though, people look forwards rather than backwards. Has it been the socialist influence in the teaching profession? Perhaps it would be unbearable to stare at the past. There are indeed older people like Abe back in 2013 who like to point out how the Tokyo War Crimes tribunals were not conducted by Japanese people, and therefore not under Japanese law. That much is true. Young people on the other hand mostly do not have a clue about what went on. Therein lies a danger.
The last 70 years have thankfully been largely peaceful, although Japan faces countless intrusions from Russian bombers in the north (much like the UK and north Europe), daily testing by Chinese fighters and 'coastguard' and fishery ships to the south, and from the west those North Korean threats to turn Tokyo into a sea of fire. Japan has not generally risen to such repeated baiting, (to the fury of some) but manfully maintained some kind of neutrality and cool head.
This whole area is full of danger, though. Where are the statesmen who can see the bigger picture? Perhaps it is time for a Pan-Pacific economic zone.
Here there is none of the peace that is enjoyed on the ground and taken for granted by all in Europe.