VEHICLE ILLUMINATION SYSTEM, VEHICLE SYSTEM, LAMP UNIT AND VEHICLE LAMP

A vehicle illumination system provided in a vehicle capable of traveling around a corner by inclining a vehicle body toward a turning direction includes: a headlamp mounted on a front portion of the vehicle; a communication lamp disposed on the vehicle body in a region adjacent to the head lamp so as to be visible from ahead of the vehicle; and an illumination control unit configured to change a lighting mode of the communication lamp depending on a state of the vehicle.