To alleviate the burden of registering compensation ledger data.

Map information is read from a map information database 4 and displayed on the screen of a client's terminal 3 (Figure. 2 (a)). The color of land or a building within a designated area 21 designated with a mouse on the screen is changed (Figure. 2 (b)). A list of addresses that match the owners of the land or buildings within the designated area is read from the database 4 and displayed on the screen of the client's terminal 3 (Figure. 2 (c)). The address and the name of the owner of the land or building selected by use of the list are registered in the compensation ledger data (Figure. 2 (d)).