To print this article, all you need is to be registered or login on Mondaq.com. Introduction "NFTs", or Non-Fungible Tokens, is a term that is not generally defined under Japanese law, but is generally understood to mean tokens minted on a blockchain that are irreplaceable. Because NFTs are digital data generated on a blockchain, but have the characteristic of being irreplaceable through the unique values assigned to them, their usage is increasing in various areas. For example, there are games in which in-game items are transferable on blockchain (hereinafter referred to as " Blockchain Games"). In Blockchain Games, unlike conventional