A communications system includes a first mobile terminal; a second mobile terminal that includes one or more mobile terminals in a state of being unable to directly communicate with the first mobile terminal and that transmits to a network, via a base station, service information indicating communications services that the second mobile terminal is able to provide in inter-terminal communication; and a communications apparatus that is provided on the network and that transmits to the first mobile terminal, information related to a communications service that the first mobile terminal is able to use, among the communications services indicated by the service information transmitted by the second mobile terminal.