Patent ID: 8570850

Claim:
An optical information recording medium comprising: a first region on which medium identification information which causes a medium type to be identified is recorded with use of guide grooves each of which has wobbles having a cycle longer than a resolution limit of an optical system of an optical recording medium reproduction device; a second region on which content information is to be recorded with use of trains of marks each of which includes a mark or a space equal to or shorter than the resolution limit of the optical system, the second region having guide grooves having a track pitch smaller than that of the first region, and the second region being provided outside an outer periphery of the first region; and a blank region provided between the first region and the second region, the blank region having a first guide groove closest to the first region and a second guide groove closest to the second region, a track pitch between the first guide groove and an adjacent guide groove in a region outside the blank region being identical to the track pitch of the first region, a track pitch between the second guide groove and an adjacent guide groove in a region outside the blank region being identical to the track pitch of the second region, the blank region including at least two tracks having a track pitch which changes from the track pitch of the first region to the track pitch of the second region, no information being recorded on the blank region, and reproduction power information for reproducing the second region being recorded on the first region.