Portable information unit and a control method for the portable information unit together with a recording medium and a control program

The invention seeks to obtain a high customer collecting effect and a high advertisement effect or to enhance a users' sense of unity with an attraction in an amusement facility such as a theme park by displaying effective information with the use of a non-contact-IC-card information processing function when the user carries a non-contact IC card. Information displayed on the display screen of the wrist-watch-type information unit 50 is changed to predetermined information, such as publicity information, advertisement information, or information prompting a user's behavior (prompting a user to come to an amusement facility), according to an elapsed time from a predetermined reference time specified by each of attraction systems 40-A to 40-N or a time left until a predetermined reference time