Information recording and reproducing apparatus and method, an information recording and reproducing system, and computer program

Information recording and reproducing apparatus (100), and recording means for recording the content data and sub-data in the information recording medium (109) (106), the first display means for displaying a menu screen to display a list of content data (107) When provided with a list of sub-data, and a second display means for displaying on the menu screen (107) with a list of the content data.