Information processing apparatus, determination method, non-transitory computer readable medium storing program, and information processing system

A determination method comprising:

• acquiring positional information associated with at least one piece of related identification information related to each of a plurality of pieces of identification information to be determined, each of the pieces of identification information identifying users in a communication service;
• specifying hierarchized positional information indicating positional information hierarchized in accordance with a granularity level of a position based on the positional information;
• calculating a similarity between pieces of identification information using the hierarchized positional information;
• and
• specifying pieces of identification information belonging to one user from among the plurality of pieces of identification information based on the similarity that has been calculated.

A non-transitory computer readable medium storing a program for causing a computer to execute the following processing of:

• acquiring positional information associated with at least one piece of related identification information related to each of a plurality of pieces of identification information to be determined, each of the pieces of identification information identifying users in a communication service;
• specifying hierarchized positional information indicating positional information hierarchized in accordance with a granularity level of a position based on the positional information;
• calculating a similarity between pieces of identification information using the hierarchized positional information;
• and
• specifying pieces of identification information belonging to one user from among the plurality of pieces of identification information based on the similarity that has been calculated.