You've had some pretty strong divides ever since, conservative elements definitely linger although I think the history of WW2 has really helped make sure the far right has never risen again since, arguably helped by a lot of economic stability, I would argue really Japan represents an alternative to what we've seen in the western world post 2008, after tis economic collapse in 1990 it didnt go with austerity politics(at least not to the same degree) to kickstart the stockmarket and help the super wealthy so you didnt get the same dropoff in living standards of the less well off and not the same degree of resentment the far right could exploit.
Ironically Japan often seems to end up as this time capsule of culture, it arguebly preserved a lot of influence from China in the middle ages in culture and architecture(alot of what we think of as Japanese minmalism actually comes from Tang/Song/Ming era China before the Manchus rule) and you could argue its also preserved the more socialist climate of the west in the post war era when the West itself has shifted back to pre great depression leuze affair economics.
To be honest though you could look at the US/UK and say really they've used WW2 as a way of whitewashing their brutal histories, both nations sold themselves as bastions of liberalism in the 19th century despite presiding over mass racists oppression to outright genocide and I think WW2(which ultimately was fought against the Germans and Japanese carrying out worse versions of the same racial supremist ideology) was exploited it really make that message stick were as a lot of the dark underbelly remained.