Abstract: A radio communication device includes, a radio communication device includes, a plurality of IC chips that conducts radio communicate with a reader/writer, a first setting unit that sets one IC chip selected from the plurality of IC chips to an exclusive-lock release state that allows radio communication to be conducted with the reader/writer, a determination unit that determines whether the radio communication is being conducted normally when radio communication between the one IC chip set to the exclusive-lock release state and the reader/writer is conducted, and a second setting unit that sets the one IC chip set to the exclusive-lock release state to a exclusive-locked state that does not allow radio communication with the reader/writer when the radio communication is determined as not being conducted normally, and sets another IC chip that is different from the one IC chip set to the exclusive-locked state to the exclusive-lock release state.

Abstract: A portable electronic device having a power supply unit and an IC chip that conducts wireless communication with a reader/writer and operates when power is supplied from the power supply unit includes a first determining unit that determines whether or not the portable electronic device, in a state in which the IC chip is operating moved, according to a result of detection by a sensor to detect movement, a second determining unit that determines whether or not a signal from an opposing device equipped with the reader/writer was received, and a power control unit that conducts control to allow a state in which power is supplied to the IC chip from the power supply unit when the first determining unit determines that the portable electronic device did not move and the second determining unit determines that the signal was received.