Spot registration system and method, search system and method, navigation system and computer program

A search system is provided with: a search database (1001); a registration spot database (1002); an association database (1003); a searching device (1201); and a display device (1202). During searching, the searching device searches the search database for search spot data, then searches the association database for association data on the basis of the searched search spot data, and then searches the registration spot database for registration spot data on the basis of the searched association data. The display device displays the searched search spot data and the searched registration spot data.