You can adjust to it....and I actually prefer it, as a single man. Not so much housework to do and lower heating bills.

Reminds me of when I lived in Chungking Mansions in Hong Kong, and decided to have the luxury of my own ROOM as opposed to sharing a dorm with 6 other guys. This was because I was starting continental shifts.

Now as in Japan, land is at a premium in HK and most 'normal' apartments are tiny anyway.

My little room was actually smaller than my current bathroom , and was really designed to accommodate TWO people, there being bunk beds in place.

It only measured 5' wide x 8' in length, with a tiny window opposite the bed.

I spent a very happy 6 months living in that space, though admittedly only for sleeping and reading etc. Seemed like luxury after sharing a dorm for the previous year.