Patent ID: 7539112

Claim:
An information recording medium including: 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; and a data area for storing information in prescribed error correction block units; wherein the first lead-in information area is an area which is subjected to recording in the prescribed error correction block units and on which lead-in information containing information about a start position of data to be recorded on the data area is to be recorded; wherein an error correction ability in the prescribed error correction block units corresponds to an information amount of n bytes; and wherein the second lead-in information area is an area on which lead-in information containing information about a start position of data to be recorded on the data area is recorded, and the second lead-in information area includes a pre-pit area being for reproduction only and having information whose amount is greater than at least n bytes regarding the prescribed error correction block units.