DEVICE, SYSTEM, AND METHOD OF DETERMINING RECLINING STATE

A reclining state determination device includes a detecting unit, an image capturing unit, and a control unit. The detecting unit detects an acceleration of a display device attached, so as to be capable of tilting, to a rear surface of a reclining seat. The image capturing unit captures an image from the display device. The control unit determines a reclining state of the reclining seat on the basis of the captured image and the detected acceleration.