A noncontact communication device includes a processor, and a transmission and reception device that applies a magnetic field to a noncontact storage medium mounted in a magnetic tape cartridge to induce power in the noncontact storage medium and is coupled to the noncontact storage medium by electromagnetic induction to perform transmission and reception of information with the noncontact storage medium. The noncontact storage medium has a measurement circuit that measures the power, and transmits power information regarding the power measured by the measurement circuit to the noncontact communication device. The transmission and reception device receives the power information, and the processor is configured to execute support processing of supporting the transmission and reception based on the power information received by the transmission and reception device.