There is provided a receiver including a first delay time calculating unit configured to calculate a first delay time indicating a time lag between transmission of a transmission signal by a transmitter and reception of the transmission signal by the receiver, a second delay time calculating unit configured to calculate a second delay time indicating a time lag between transmission of a response signal by the receiver and reception of the response signal by the transmitter, and a time difference calculating unit configured to calculate a time difference between a time of a clock in the transmitter and a time of a clock in the receiver.