DETECTION DEVICE AND DETECTION METHOD

A detection device is provided with: a detection unit which detects an object present around a vehicle V; a specification unit which specifies a detection continuation time period in which the detection unit has continuously detected the object; and an information output unit which, on the condition that the detection continuation time period specified by the specification unit has exceeded a determination time period for determining whether or not the object is a detection target object, outputs presence information indicating detection of the target object by the detection unit