1. A route guidance apparatus for a moveable body, the apparatus comprising: a controller that: sets a navigation route; acquires a position of the movable body; based on the acquired position, determines a guidance intersection in front of the movable body in a direction of travel along the navigation route; acquires a shape of the guidance intersection; determines an exit road on which the movable body leaves the guidance intersection according to the navigation route; based on the acquired shape of the guidance intersection, determines whether the determined exit road is one of a plurality of roads connected to the guidance intersection that exist in an area extending in the same direction as the determined exit road; when the determined road is one of the plurality of roads that exist in the area extending in the same direction as the exit road, associates each of the plurality of roads with an identification information item usable to identify a connecting relationship with the guidance intersection; and provides guidance on the guidance intersection using the identification information item associated with the exit road.