In Japan, crypto-generated earnings are currently taxed between 15 and 55 percent. However, authorities are considering reducing this tax rate to a flat 30 percent for corporate investors and 20 percent for individual investors in FY 2025. cryptocurrency In Japan, crypto-generated earnings are currently taxed between 15 and 55 percent. However, authorities are considering reducing this tax rate to a flat 30 percent for corporate investors and 20 percent for individual investors in FY 2025.