If Japan reduces crypto tax to 20%, 10-20 trillion yen (up to $130 billion USD) could flow into Japan's crypto markets in the coming years (2025-2027).
"back in December of 2021 the CEO of Japan's Bitcoin exchange told CoinDesk that if the authorities were to reduce the tax on crypto gains to 20% then some 10 to 20 trillion yen would return to Japan's crypto markets on the higher end that's 130 billion US suggesting that we might see some unfathomable inflows coming from Japan in the coming years"