A mobile communication network distribution system provided in a mobile communication system that includes a plurality of mobile communication networks (103, 104) including a mobile communication network providing a function satisfying functional requirements that differ from another mobile communication network and a mobile communication terminal, comprising: acquisition means for acquiring condition information including at least one of information indicating a type of the mobile communication terminal, information indicating the content of a contract of the mobile communication terminal in the mobile communication system, information indicating a moving state of the mobile communication terminal, information indicating the content of a service which the mobile communication terminal requests from the mobile communication system, and information indicating a communication quality of the mobile communication network (103, 104) included in the mobile communication system; determination means for determining a mobile communication network that provides a function satisfying functional requirements based on the condition information acquired by the acquisition means among the plurality of mobile communication networks (103, 104) to be a connection destination mobile communication network which is a connection destination of the mobile communication terminal; and distribution means for distributing the connection destination of the mobile communication terminal to the connection destination mobile communication network determined by the determination means, wherein the plurality of mobile communication networks include a degenerate mobile communication network which is a mobile communication network that provides limited functions, said limiting functions referring to communication related services which are provided to the mobile communication terminal by the mobile communication network, and the determination means is adapted to determine the degenerate mobile communication network that provides the function based on the condition information acquired by the acquisition means among the plurality of mobile communication networks to be the connection destination mobile communication network. acquisition means for acquiring condition information including at least one of information indicating a type of the mobile communication terminal, information indicating the content of a contract of the mobile communication terminal in the mobile communication system, information indicating a moving state of the mobile communication terminal, information indicating the content of a service which the mobile communication terminal requests from the mobile communication system, and information indicating a communication quality of the mobile communication network (103, 104) included in the mobile communication system; determination means for determining a mobile communication network that provides a function satisfying functional requirements based on the condition information acquired by the acquisition means among the plurality of mobile communication networks (103, 104) to be a connection destination mobile communication network which is a connection destination of the mobile communication terminal; and distribution means for distributing the connection destination of the mobile communication terminal to the connection destination mobile communication network determined by the determination means, wherein the plurality of mobile communication networks include a degenerate mobile communication network which is a mobile communication network that provides limited functions, said limiting functions referring to communication related services which are provided to the mobile communication terminal by the mobile communication network, and the determination means is adapted to determine the degenerate mobile communication network that provides the function based on the condition information acquired by the acquisition means among the plurality of mobile communication networks to be the connection destination mobile communication network.