Abstract: In a position estimation of a terminal using a beacon, the precision is improved by reducing influences of noise due to moving obstacles such as human so that a beacon region can be easily and flexibly constituted. According to a typical embodiment, a portable terminal includes a location determination unit that acquires beacon information including a reception intensity of each of beacon signals received from one or more of the beacon terminals, accumulates history data as beacon detection information, acquires a plurality of pieces of the beacon information accumulated as the beacon detection information and contained within a past predetermined period at every predetermined interval, aggregates the beacon information by scoring, and determines the beacon terminal located most closely based upon scores.