INFORMATION RECORDING MEDIUM, INFORMATION RECORDING DEVICE AND METHOD, AND COMPUTER PROGRAM

摘要

An information recording medium (100) is provided with a first recording layer (L0) and a second recording layer (L1) wherein recording information can be recorded. The information recording medium includes a plurality of first block areas, each of which includes a first size recording area (105a) in the first recording layer, and a first size recording area (115a) in a second recording layer positioned to face the first size recording area in the first recording layer. At least one of the first recording layer and the second recording layer is provided with size areas (104, 114) for recording first size information (121) indicating the first size.