An attempt is made to make it possible to efficiently perform the finalizing process and closing process in a short period of time and securely manage the last address of a border-out. When the border closing or finalizing process is performed after user data is recorded, a padding process is performed for at least a discontinuous area in the data area and a border-out is lastly recorded in a first step. Then, in a second step, latest recording management data (RMD) is recorded in a recording management data duplication zone (RDZ) of a data lead-in area, latest recording management data (RMD) is recorded in an unrecorded area of a present recording management zone (RMZ) and R physical format information (R-PFI) is recorded in an R physical format information zone (R-PFIZ).