NAVIGATION DEVICE, RECORDING MEDIUM STORING NAVIGATION PROGRAM, AND NAVIGATION SYSTEM

A navigation device that includes: a memory; and a processor that is configured to: acquire route information relating to a planned route to be traveled by a second vehicle of a user having a friendly relationship with a user of a first vehicle, search for a guided route based on a current position of the first vehicle and the route information, such that at least one of the first vehicle or the second vehicle heads toward a common location, and output route guidance information relating to the guided route to at least one of the first vehicle or the second vehicle.