My experience living in Japan is that thermal and noise insulation is pretty much non-existent here.

It costs a bunch. Renting a reasonably priced standard room in Tokyo won't land such perks.

Going up to family size appartments in recently built middle-class complexes will usually come with pretty good insulation and you won't hear a baby crying at top volume.

The sad thing is that I live in Aomori, and the construction quality here is abysmal. I would understand the lack of proper insulation in warmer areas, but in Tohoku and Hokkaido?

And don't get me started on the lack of proper central heating and the use of the stupid portable kerosene heaters. Today I heard from a guy who is working for the village office that the most common emergency call now in winter are from elder people who suffered thermal shock inside their own houses when walking from a warm room to an almost frozen room.