CONTROLLER, VEHICLE BODY BEHAVIOR CONTROL SYSTEM, MOTORCYCLE, AND CONTROL METHOD

The present invention obtains a controller capable of improving safety of a motorcycle. The controller that controls vehicle body behavior of the motorcycle includes: an acquisition section that acquires trigger information generated in accordance with peripheral environment of the motorcycle; and an execution section that initiates a control mode making the motorcycle execute an automatic brake operation in accordance with the trigger information acquired by the acquisition section and makes the motorcycle generate a braking force. The acquisition section further acquires deceleration resistance information that is information related to a driver's driving posture on the motorcycle, and the execution section changes a control command that is output in the control mode in accordance with the deceleration resistance information acquired by the acquisition section.