but the population that holds the most bitcoin in the world is Asia, because bitcoin first developed from Asia first
of course because Asia is the first place in the world to know bitcoin, so now Asia is the number one bitcoin holder in the world because development in Asia is very good
It would be better if you cite some links to support your claim, because if not it will be just nothing but a pure opinion. And again, bitcoin wasn't came from Japan nor Asia as this thing is still uncertain. Please don't conclude or create confusion.
Alright, for once and for all, read this with apprehension.
https://www.quora.com/What-countries-are-the-biggest-holders-of-bitcoin