Address searching system and method, navigation system and computer program

The address searching system includes a first database (1001), a second database (1002), a first searching device (1003), a second searching device (1004), a processing device (1005) and a displaying device (1006). During an address searching, the processing device scores a point to each of the plurality of name data retrieved from the first database by the first searching device, on the basis of the coordinate data corresponding to the retrieved name data and the road map data retrieved from the second database by the second searching device, in order to indicate quantitatively by a predetermined standard a road existence condition within a geographical section or at a representing spot thereof existing in a search area, and the displaying device displays the plurality of name data each indicating a name of the geographical section or a name of the representing spot existing within the search area in an order from the highest score.