Each of wearable terminals includes a terminal time correction unit configured to correct terminal time of a terminal clock unit based on time data externally acquired, a terminal data generation unit configured to generate terminal data at a predetermined data generation time interval counted based on an output signal of an oscillation circuit, and a data transmission/reception unit configured to transmit the terminal data to an analysis apparatus. The analysis apparatus includes a terminal data correction unit configured to correct, for each of the wearable terminals, terminal time data of the plurality of pieces of terminal data received from each of the wearable terminals. The terminal data correction unit corrects the terminal time data of the plurality of pieces of terminal data in such a way that intervals between the terminal time data of the plurality of pieces of terminal data become even on the time axis.