To provide a user interface excellent in browsability of a text content which has time series.

A series of character strings which compose a content, such as a mini blog and news, are time-sequentially arranged and spirally displayed as the character strings are winded, the character strings are shown as they are sequentially pulled out from a spiral corresponding to a pulling operation. Therefore, an excessive change of a character size can be avoided and the characters can be fluently legible, and a user interface excellent in browsability of a text content which has time series can be achieved.