A media player according to an embodiment includes: a data retriever configured to retrieve, from data recorded on a medium from which a content is run, data including an address that indicates a recording position on the medium of the content provided by the medium; and an ID determination unit configured to determine an ID for identifying the provided content in accordance with the retrieved data in order to acquire, from an external device that stores information related to the content, the information associated with the ID and related to the provided content, by communicating the ID to the external device.