Is there capital gains tax on non-permanent taxpayer residents (< 5 years) even if I don’t remit?

My friend was saying over some threshold of net worth / capital gains, you have to report worldwide assets even if you’ve been in Japan less than 5 years. You then get taxed on worldwide capital gains even if you DO NOT remit funds to Japan.

I browsed around everywhere and couldn’t seem to find anything on this. Is he making stuff up?

by floxik