Further, the first wireless communication apparatus may wirelessly and continuously communicate every predetermined time with the one or the plurality of electronic tags or portable terminals of which a positional relationship satisfies a predetermined condition (a positional relationship capable of performing communication with each other), and may store each identification information obtained from the electronic tag or the portable terminal in association with the obtained date and time. Then, the provision image data and the identification information having the same or close (for example, closest or within a predetermined time) imaging date and time and the same or close identification information obtainment date and time may be associated with each other.
The storage unit 11 stores each of the plurality of pieces of provision image data in association with one or a plurality of pieces of identification information obtained by the first wireless communication apparatus at a date and time (an imaging date and time) when each provision image data is generated or at a date and time close to the date and time.