We moved to Canada from Japan about 5 years ago. We only started downsizing 2 years ago, and now we have way less stuff than we ever did in Japan.
See my old apartment here: https://chadkohalyk.com/2016/01/22/our-japanese-mansion/
I wish we here in North America planned our spaces much better.
Downsizing is not just about space. It is about lessening stress, having a smaller environmental impact, increasing financial freedom, and many other things.
I recommend it.