Abstract: Reservations for a plurality of tables are managed. Input of the number of persons with a reservation for a customer coming to a store on a reservation date is received, icons respectively corresponding to the plurality of tables arranged inside the store are displayed on a screen, a selection of the displayed icons is received, and after the input of the number of persons with a reservation and the selection of the icons are established, reservation information including customer identification information that specifies the customer, the reservation date, the number of persons with a reservation and table identification information corresponding to the selected icons is generated for each piece table identification information, and in the case that the plurality of icons are selected, group identification information that specifies a group formed of the plurality of tables is issued and added to each piece reservation information.