Patent ID: 8355312

Claim:
An information recording medium comprising: a lead-in area; a first lead-in information area located in the lead-in area; a second lead-in information area located in the lead-in area; a data area for storing user information; a first groove area having a groove; and a second groove area having a groove; wherein the first lead-in information area is an area which has a first physical characteristic and on which lead-in information for recording or reproducing user information on or from the data area is to be recorded; wherein the second lead-in information area is an area which has a second physical characteristic different from the first physical characteristic and which includes an embossed area representing lead-in information for recording or reproducing user information on or from the data area; wherein the data area has the first physical characteristic; and wherein the first groove area continuously connects with a front side of the embossed area, and the second groove area continuously connects with a rear side of the embossed area.