Execution of an application that functions when a mobile communication terminal is performing communication in a particular mobile communication network. A mobile communication terminal includes an application execution unit for executing one or more applications, a mobile communication unit for performing location registration in a mobile communication network for establishing a communication state, a communication network specifying unit for specifying the mobile communication network in which location registration is made, and an application control unit for performing control on the application execution unit so as to start an application corresponding to the specified mobile communication network.