This invention intends to provide a vehicle-mounted driving recorder that can obtain necessary situation data only surely and accurately and that can contribute to effective use of a memory and to facilitation of an after-the-fact analysis of the situation data. A computer of the interactive system automatically determines predictive information for the communication based on environmental data provided for the communication independent of information provided by the initiating party during the communication. The contact includes multiple adjacent, electrically conductive members, each including a rigid portion and a flexible portion projecting from the rigid portion. The first and second hook-shaped poles are alternately arranged in a circumferential direction of the rotor.