Information recording medium, reproducing method and reproducing apparatus

An information recording medium, a reproducing method and a reproducing apparatus are provided to provide update information to a user to update a software by informing the software of the playing device need updating. An information recording medium(100) includes A/V data and data(110) for updating a software of a device playing the A/V data. The data updating the software includes a software update information file having software update information. The software update information file includes at least one of a software type indicating that the software is for which kinds of a CPU, a manufacturer name of the playing device, a model name of the playing device, version information of the software, and an update message informing a user of update information.