A media processing device, a control method for a media processing device, and a control program for the same can accurately detect the last one or specified number of media stored in the media stacker. Media stackers store media in a stack. Media processing units write data and/or print a label on the media. A media transportation mechanism has a transportation arm that can hold the media and move vertically, and transports the media between the media stackers and the media processing units by movement of the transportation arm. A control unit controls the media processing units and the media transportation mechanism 31. The control unit has a measurement unit that measures the height of media stacked in the media stacker when media is removed from the stacker by the media transportation mechanism, and a comparison unit that compares the measured media height with a reference value to detect the difference therebetween, and determines the remaining media count in the media stacker.