[rendaw]

I think Japan has something similar, does anyone else know? A lot of big buildings have free/open roof terraces.

Most are fairly claustrophobic. The Ikebukuro Seibu building had an amazing, open roof garden with this big reflecting pool round table: https://danzuka.earth/019_seibu-ikebukuro-roof-garden/ . It was pretty quiet, and it was especially great because there are basically no public tables in Ikebukuro, so you could buy food at the shops below and eat it on the roof (plus it had toilets, trash cans, and drink vending machines!)

They just demolished it and replaced 70% of the space with a big BBQ restaurant though. So I feel like either whatever legal requirement they had to create the space must have expired, or maybe it was used as part of the initial pitch when they were getting permits for the building and now that it's established they can walk back guarantees or whatever...