Yet another question about buying/selling crypto

Hi, sorry if this was asked before.

Let's say I put 400万円 in my bank in japan.
I move that to the local Japanese crypto exchange and buy 400万円 worth ETH.
Then I move that ETH out to a cold wallet, and it doubles in value to 800万円 in a month.

This is, 400万円 profit, and 20% is taxable, so around 80万円.

But lets say, I move this 800万円 to an exchange in my own country where crypto is not yet taxed.
Sell the crypto there, (or sell it in any other DEX).

Move the money into my local bank account back in my country.
Then send the money to my local Japanese bank via various money transfer platforms.

Did I avoid a tax event? Or did I get myself into big trouble?

P.S : I wont be needing people to tell me to pay my taxes, I didn't pay any crypto taxes yet, and not planning on paying any. Go tell rich people to pay taxes. Or go talk to the governments allow/turn a blind eye to rich people to not pay taxes.

by exivor01