A relay station is capable of relaying communication between a radio communication terminal and a base station, and includes a communication quality acquisition unit which, when communication between the radio communication terminal and the base station is relayed, acquires communication quality in communication between the self-station and the radio communication terminal; an interference determination unit, which determines whether the communication between the self-station and the radio communication terminal is receiving interference based on the acquired communication quality; and an interference notification unit which, if it is determined that the communication is receiving interference, notifies the base station of interference information informing of the interference in order to prompt handover of a radio communication terminal, which is communicating with the base station.