The present invention is a radio communication system in which a radio terminal obtains measurement information designated by a network in an idle state and reports the obtained measurement information in an active state, the radio communication system comprising: a radio station con to operate a first cell of a first Radio Access Technology, wherein, in the first cell, the radio station comprises; notifying means configured to notify the radio terminal of first configuration information related to obtainment of the measurement information in the first cell; and a request means configured to request the radio terminal to obtain, after the radio terminal moves to a second cell of a second Radio Access Technology different from the first Radio Access Technology, the measurement information in the second cell.