1. An information communication method of obtaining information from a subject, the information communication method comprising: setting an exposure time of an image sensor so that, in an image obtained by capturing the subject by the image sensor, a bright line corresponding to an exposure line included in the image sensor appears according to a change in luminance of the subject; capturing the subject that changes in luminance by the image sensor with the set exposure time, to obtain the image including the bright line; and obtaining the information by demodulating data specified by a pattern of the bright line included in the obtained image.