A license receiver comprises a viewing license invalidating unit which invalidates a viewing license of a content a viewing time limit of which is not determined, and a first control unit. When the first control unit reproduces the content, (i) if the viewing license is valid, the first control unit determines the viewing time limit, and (ii) if the viewing license is invalid, the first control unit transmits a viewing license request including a request of determining viewing time limit, to the license server, and receives the determined viewing time from the license server. When the first control unit writes out the content to an exchangeable medium before reproducing the content, if the viewing license is valid, the first control unit invalidates the viewing license and writes out the non-determined viewing time limit to the exchangeable medium.