DIRECTION CHANGE DETECTION DEVICE, VEHICLE, DIRECTION CHANGE DETECTION METHOD, AND STORAGE MEDIUM

An on-board unit as a direction change detection device is configured to acquire a steered angle and a mileage of a vehicle at a time point at which a right turn event related to a right turn of the vehicle occurs when the right turn event occurs, and detect the right turn on condition that a maximum value of the steered angle is equal to or less than a first threshold value, and the mileage is equal to or greater than a second threshold value.