A plurality of characters that are candidates for entry are displayed on a display surface of a display corresponding to an operation surface of a touch panel as character buttons. A touch detector judges whether a user touches the operation surface either with a single point or plural points, and detects a position touched by the user. An input receiver receives an entry of a character associated with a character button in the position touched by the user among the plurality of characters displayed on the display surface of the display. Then, the input receiver receives the entry of the character which varies in type depending on whether the user touches an area in the operation surface corresponding to an identical character button with a single point or plural points.
