Abstract
Income from crypto assets generally falls under the taxable category of miscellaneous income by National Tax Agency in Japan because crypto assets is considered as means of payment. But a large variety of crypto assets needs to be fell under the proper taxable category in the income tax law depending on the features of crypto assets. A purpose of this article is to clarify the proper taxable category in the income tax law that a large variety of crypto assets fell under, based on the characteristic systematically classifying crypto assets. As findings by the theory analysis of this article, income from sale etc. of crypto assets classified in means of payment falls under the taxable category of miscellaneous income, and income from sale etc. of crypto assets not classified in means of payment falls under the taxable category of transferred income.