According to the present invention, a server (100) performs processing to chronologically display messages exchanged between registered members associated with an itinerary plan. When spot information has been registered as a message, the server (100) displays the spot information and causes a display unit to display an instruction operation component for instructing that the spot information be registered with the itinerary plan. Then if an instruction operation is performed on the instruction operation component, the server (100) adds, to the itinerary plan, the spot information registered as a message.
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