Vehicular travel guidance device, vehicular travel guidance method, and computer program

A charging facility located in a search target area is searched for; if the charging facility is located in the search target area, a travelable area, within which a vehicle 2 starting traveling from the charging facility is able to travel by consuming a predetermined percentage of a maximum charging energy amount of a battery 3, is calculated; and a display mode of the map image to be displayed on a liquid crystal display 15 is varied based on the calculated travelable area.