1. An information processing system comprising: circuitry configured to: acquire image data corresponding to a target object that is a target for gesture recognition captured by an imaging device; determine whether a distance between the target object and the imaging device is inadequate for recognition of a gesture made by the target object; and output a notification when the determining determines that the distance between the target object and the imaging device is inadequate for recognition of a gesture made by the target object, wherein the circuitry is further configured to determine the distance between the target object and the imaging device; and compare the distance to a predetermined threshold value, and the circuitry is configured to determine that the distance between the target object and the imaging device is inadequate for recognition of a gesture made by the target object when the distance is less than the predetermined threshold value.