Information recording-reproducing method, information reproducing methods, and information recording method.

摘要

A configuration for reading out disc management information easily without errors from a disc in which recording is conducted with data recording densities of a plurality of kinds. An optical disc (1) includes a plurality of data recording areas (103; 104) in which information is recorded with data recording densities which are different from each other. Information of the data recording densities in the data recording areas (103; 104) is recorded in a management information recording area (a BCA area (101) or a PIC area (102)) by using a unique format which does not depend upon the data recording densities of the data recording areas (103; 104). The divided data recording areas are disposed in the same plane of the disc, or disposed over a plurality of recording layers.