SYSTEM, INFORMATION PROCESSING DEVICE, METHOD, AND COMPUTER-READABLE MEDIUM

The present disclosure enables determination of whether a passenger is holding a pole without installing a sensor, such as a contact sensor, at each of a plurality of places where a passenger may hold. A skeleton information acquisition means (51) analyzes an in-vehicle video acquired from a camera (31) that captures an image of a vehicle interior of a moving object (30), and acquires skeleton information of each of one or more passengers boarding on the moving object (30). A holding determination means (52) determines whether the passenger is holding a pole, based on skeleton information of the passenger and a position of the pole in the moving object (30). An alert output means (53) outputs an alert when it is determined that the passenger is not holding the pole.