Patent ID: 7525900

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 having land pre-pit addresses and being 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 relating to 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 wherein n is a positive integral number; and wherein the second lead-in information area is an area on which lead-in information relating to the data area is recorded, and the second lead-in information area includes a pre-pit area having information whose amount is greater than at least n bytes regarding the prescribed error correction block units.