In a mobile communication method according to the present invention, in a communication start procedure of a mobile station camps on a femtocell, acquiring, by an exchange 20, a frequency of the femtocell and a femtocell ID for uniquely identifying the femtocell which are held in a controller 10, storing, by the exchange 20 and a home location register 30, the acquired frequency of the femtocell and the acquired femtocell ID in association with subscriber information of the mobile station UE, performing, by the exchange 20 and the home location register 30, location registration to register the mobile station UE for a location registration area to which the femtocell geographically overlaid with the macrocell belongs, in response to the received location registration request signal, in a release procedure of the radio connection after completion of the location registration, notifying, by the controller 10, the mobile station UE of the notified frequency of the femtocell notified by the exchange 20.