INFORMATION RECORDING MEDIUM AND REPRODUCTION DEVICE

摘要

An optical disk (100) is provided with: a medium information region (101) in which type identification information is recorded by recesses and/or protrusions the lengths of which are longer than the length of the optical system resolution limit of a reproduction device being formed in accordance with a predetermined modulation method, and address information is recorded in a first address data format; and a data region (102) in which content data is recorded by recesses and/or protrusions the lengths of which include a length shorter than the length of the optical system resolution limit being formed in accordance with the predetermined modulation method, and the address information is recorded in a second address data format.