A base station according to a present embodiment includes: a controller configured to set first determination parameters used for a radio terminal to determine whether to switch a standby destination or a connection destination between the mobile communication network and a wireless LAN; a transmitter configured to transmit the first determination parameters to a radio terminal served by the base station; and a receiver configured to receive information notified from another base station. The controller is configured to set the first determination parameters in consideration of the information.