A system comprising a reproduction apparatus and a recording medium, the reproduction apparatus comprising: a reading control section configured to perform a reading control for continuously reading interleaved data from the recording medium which records a file of an ISO base media file format, the file including the interleaved data which is obtained by dividing each data stream of a plurality of files recorded on the recording medium into interleave units which are fragments of the data stream and by interleaving the interleave units of the data streams of the plurality of files, and which is physically and continuously recorded on the recording medium, and position information of each interleave unit, wherein the position information indicates, using the interleave unit as a chunk of the ISO base media file format, each position of each interleave unit which forms the chunk, on the interleaved data, wherein the chunk corresponds to a set of one or more samples arranged in addresses which are logically continued and the position information is provided either at a header of the file of the ISO base media file format or a final position of the file of the ISO base media file format; an obtaining section configured to obtain the position information of each interleave unit from the header or the final position of the ISO base media file format stored on the recording medium; and a de-interleaving control section configured to perform a de-interleaving control for de-interleaving the interleaved data into the interleave units of each of the data streams of the plurality of files on the basis of the position information and re-forming each of the data streams of the plurality of files which includes the interleave units. a reading control section configured to perform a reading control for continuously reading interleaved data from the recording medium which records a file of an ISO base media file format, the file including the interleaved data which is obtained by dividing each data stream of a plurality of files recorded on the recording medium into interleave units which are fragments of the data stream and by interleaving the interleave units of the data streams of the plurality of files, and which is physically and continuously recorded on the recording medium, and position information of each interleave unit, wherein the position information indicates, using the interleave unit as a chunk of the ISO base media file format, each position of each interleave unit which forms the chunk, on the interleaved data, wherein the chunk corresponds to a set of one or more samples arranged in addresses which are logically continued and the position information is provided either at a header of the file of the ISO base media file format or a final position of the file of the ISO base media file format; the interleaved data which is obtained by dividing each data stream of a plurality of files recorded on the recording medium into interleave units which are fragments of the data stream and by interleaving the interleave units of the data streams of the plurality of files, and which is physically and continuously recorded on the recording medium, and position information of each interleave unit, wherein the position information indicates, using the interleave unit as a chunk of the ISO base media file format, each position of each interleave unit which forms the chunk, on the interleaved data, wherein the chunk corresponds to a set of one or more samples arranged in addresses which are logically continued and the position information is provided either at a header of the file of the ISO base media file format or a final position of the file of the ISO base media file format; which is obtained by dividing each data stream of a plurality of files recorded on the recording medium into interleave units which are fragments of the data stream and by interleaving the interleave units of the data streams of the plurality of files, and by dividing each data stream of a plurality of files recorded on the recording medium into interleave units which are fragments of the data stream and by interleaving the interleave units of the data streams of the plurality of files, and which is physically and continuously recorded on the recording medium, and an obtaining section configured to obtain the position information of each interleave unit from the header or the final position of the ISO base media file format stored on the recording medium; and a de-interleaving control section configured to perform a de-interleaving control for de-interleaving the interleaved data into the interleave units of each of the data streams of the plurality of files on the basis of the position information and re-forming each of the data streams of the plurality of files which includes the interleave units. re-forming each of the data streams of the plurality of files which includes the interleave units.