Navigation device, information input/output device, navigation system, navigation display method, and navigation display program

Navigation display devices, systems, methods, and/or programs acquire map data; generate output data for displaying a map based upon the map data; and send to an information input/output device an amount of the output data that is greater than one output section, one output section being an amount of the output data that can be displayed on a single screen of the information input/output device. Navigation display devices, systems, methods, and/or programs receive an amount of output data greater than one output section from a navigation device; record at least a portion of the output data in the recording device; output a section of the output data on the output portion; and shift the output data that is output on the output portion in accordance with a shift request from the input portion, such that a different section of the output data is displayed on the output portion.