INFORMATION PROCESSING DEVICE AND VEHICLE

The information processing device includes an acquisition unit that acquires detection information detected by a detection unit including the vehicle speed of the own vehicle and the inter-vehicle distance from another vehicle running ahead of the own vehicle in the traveling direction of the own vehicle; displaying on a display unit in the vehicle a graphical image representing information about the inter-vehicle time required for the own vehicle to reach the position where the other vehicle is located, which is derived using the acquired detection information; a display control unit that changes display of the graphic image when a magnitude of variation in at least one of the vehicle speed and the inter-vehicle distance included in the information exceeds a predetermined threshold.