Yahoo Japan Corporation

Chihiro Sugioka

Shinsuke Itoh

Ai Ito

A server includes a terminal information acquisition unit, a region specifying unit, and a distribution information generation unit. The terminal information acquisition unit acquires from each of a plurality of first terminal devices, terminal information including measurement information used to calculate a distance from each of second terminal devices to each of the plurality of first terminal devices for each second terminal device present near the first terminal device and position information of the first terminal device. The region specifying unit specifies a region in which the second terminal device is disposed at a distance according to the measurement information from the position of each of the first terminal devices. The distribution information generation unit generates the information indicating the distribution of the positions of the first terminal device and the second terminal device based on the region specified by the region specifying unit.

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Tokyo, Japan

Chihiro Sugioka