The present invention reliably acquires subsequent data corresponding to an information recording medium from a local storage unit, and performs data reproduction by establishing a virtual file system (VFS). An information processing device includes a data processing unit for reproducing data by reading recorded data in the information recording medium and storage data in a local storage unit which is different from the information recording medium. The data processing unit performs the selection process of data associated with the information recording medium as target reproduction data from the local storage unit. When performing the process for selecting the target reproduction data, the data processing unit performs the calculation process of a name of directory where a conversion function specific to the version of the information recording medium is applied with respect to the data configuring a route certificate recorded in the information recording medium, and selects the data recorded in the directory having the calculated name of directory from the local storage unit as the target reproduction data.