Disclosed is a display controller having: time line display means that includes at least two or more units of time on, of a first display area and a second display area that are formed on display means, the first display area, and that displays a time line manipulable to specify a desired unit of time from the two or more units of time; and related information display means that reads out, from a plurality of pieces of information stored respectively including time information added, information to which are added time information related to a unit of time specified by manipulation of the time line displayed on the first display area through operating means, and that displays the read out information on the second display area of the display means.