Abstract: Provided is an account issuance system that can open an account owner in a service server to the outside without revealing personal information. Terminal 1 transmits joint identification information set by a user to account server 3. After having received the joint identification information from terminal 1, account server 3 generates a public ID to enable a third party different from the user to identify the user by using the joint identification information and a unique ID, and transmits the public ID to user terminal 1. After having received the public ID, user terminal 1 transmits the public ID to service server 2. After having received the public ID from user terminal 1, service server 2 sets the public ID so that the public ID can be opened to the outside.