A token issuance method in a blockchain system includes, transaction parties associated with a transaction for transfer of a right regarding an asset, and an executing party to execute the transaction, and the nodes sharing, as a token, an execution function for a transaction regarding the asset, and information of the asset, the token issuance method including: causing an information processor to generate, information including executing party information, a transaction initiation determination function to, in response to receipt a request for execution of a transaction by the executing party from a predetermined transaction party, perform a process of determining whether to execute the transaction depending on determining whether the request for execution designates the executing party indicated by the executing party information, and a transaction execution function to execute the transaction based on the request for execution, and execute payment of a reward to a right holder.