A navigation system for a vehicle for generating a plurality of routes from a present position of the vehicle to a destination acquires the present position. The system stores map data of a map and storing position detection data. The system displays the map based on the map data. The system forms a factor chart of each of the plurality of routes and the associated one or more factors. The system causes the factor chart of the associated one or more factors of the each of the plurality of routes to be displayed. The system searches for at least one facility located along the each of the plurality of routes based on the position detection data. The system causes the at least one facility to be displayed together with the chart of the associated factor.