To do a display capable of maintaining high display efficiency and making the time interval of data easily graspable in the case of displaying data icons based on time order related to data.

A spiral locus 104 having plural arranging positions for displaying data icons is displayed. The time information of plural stored data items is acquired and the data items are allocated to respective arranging positions on the locus in the time order. Then, icon images 105a, 105b, 102 corresponding to the allocated data items are displayed on respective arranging positions. When a time difference obtained by the time information of two data items allocated to adjacent arranging positions on the locus 104 exceeds prescribed time, the state is displayed between the arranging positions (106a, 106b, 106c).