Driving support device, method and computer program product

A driving support device comprises information acquisition units for acquiring information indicating a position of a vehicle, information indicating a registered position that has been previously registered, information indicating a position and a charging capacity of a charging facility that exists within a predetermined distance from the position of the vehicle, and information indicating remaining electric power amount of a battery at the position of the vehicle, the battery being installed in the vehicle, and a guidance unit that provides information indicating a charging time period at the charging facility based on the position of the vehicle, the registered position, the position and the charging capacity of the charging facility, and the remaining electric power amount of the battery, wherein the charging time period being required for traveling a route from the position of the vehicle to the registered position by electric power of the battery.