The magnetic tape cartridge includes a magnetic tape that is accommodated in the magnetic tape cartridge while being wound around a reel hub. A water absorption amount of the magnetic tape measured after the magnetic tape cartridge is stored in a storage environment of a temperature of 32° C. and a relative humidity of 80% for 10 days is more than 0.30 g as a value in terms of a length of the magnetic tape of 1000 m, and the water absorption amount is a value measured in a measurement environment with a temperature of 21° C. and a relative humidity of 50% within 1 hour after the storage.

The magnetic tape cartridge includes a magnetic tape that is accommodated in the magnetic tape cartridge while being wound around a reel hub. A water absorption amount of the magnetic tape measured after the magnetic tape cartridge is stored in a storage environment of a temperature of 32° C. and a relative humidity of 80% for 10 days is 0.30 g or less as a value in terms of a length of the magnetic tape of 1000 m, and the water absorption amount is a value measured in a measurement environment with a temperature of 21° C. and a relative humidity of 50% within 1 hour after the storage.

A magnetic tape cartridge includes a case that houses a magnetic tape and has an opening, a door that is provided in the case and closes the opening, and a fixing portion that fixes the door to the case.

A magnetic tape cartridge includes a case that houses a magnetic tape and has an opening, a door that is provided in the case and closes the opening, and a fixing portion that fixes the door to the case.

A noncontact storage medium that is mounted in a magnetic tape cartridge includes an IC chip that is connected to an antenna to be coupled to a communication destination by electromagnetic induction through a magnetic field applied from the communication destination, and performs communication with the communication destination through the magnetic field, and the IC chip corresponds a plurality of communication standards, and performs the communication selectively using the plurality of communication standards.

Provided is a magnetic tape cartridge including: a case in which a magnetic tape is accommodated; and a storage medium provided in the case, in which the storage medium stores tension allowable range related information regarding an allowable range of tension applied to the magnetic tape.

The magnetic recording medium includes a non-magnetic support; and a magnetic layer containing a ferromagnetic powder, in which the magnetic layer includes an abrasive, the abrasive is a carbide, an average primary particle diameter of the abrasive is 10 nm or more and 100 nm or less, and in an electron microscope image of a surface of the magnetic layer, assuming that a total area occupied by the abrasive is 100%, a ratio of an area occupied by the abrasive present in an aggregated state having a maximum Feret diameter of 0.2 .Math.m or more is 50% or more.

A magnetic tape cartridge includes a case in which a magnetic tape is accommodated and a storage medium provided in the case. At least one of reading or writing of data is performed by a plurality of magnetic elements, which are linearly disposed, with respect to the magnetic tape pulled out from the case. A disposition direction of the plurality of magnetic elements is tilted toward an entire length direction side of the magnetic tape with respect to a width direction of the magnetic tape. The storage medium stores tilt feature information indicating a feature of tilt of the disposition direction with respect to the width direction.

A noncontact communication device includes an antenna, and a processor configured to couple a noncontact storage medium mounted in a magnetic tape cartridge and the antenna by electromagnetic induction to perform communication with the noncontact storage medium. The processor is configured to perform communication in each of a plurality of communication standards, and perform communication with the noncontact storage medium in a communication standard corresponding to the noncontact storage medium among the plurality of communication standards.

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.