I once met somebody on the train who lives in the Bay Area and told me that her dating experiences in the area with tech guys included more than one "guy who just has a mattress on the floor". If there's any takeaway from the 15 seconds you spent looking at this article and the comments, you should buy a bed frame. Any bedframe. Just take the mattress off the floor. If you're on this site, you can afford one. Extra c…
https://www.google.com/search?q=%E5%B8%83%E5%9B%A3&udm=2
Often you pull out a small table (kotatsu) and put it in the center of the room in the day.
https://www.google.com/search?q=%E3%81%93%E3%81%9F%E3%81%A4&...
Korea is the same except tatami mats are less common.
Of course now-a-days, lots of Japanese and Koreans sleep on beds but futon are not uncommon.