A wearable device is worn by a person participating in an event in which a plurality of other people are participating and wearing other wearable devices. The wearable device includes a request unit for transmitting a request signal to other wearable devices that are in a predetermined range, and receiving a response to the request signal from each of the other wearable devices, and a communication unit for determining, with use of the received responses, one or more of the other wearable devices to be a communication partner, and performing data communication with the determined one or more other wearable devices. The data received in the communication is data collected by the one or more other wearable devices determined to be communication partners, and the data is used as a profile component when creating a profile of the event.