Information processing apparatus, terminal, information processing method, warning method, and information processing system

A terminal, comprising:

• a communicator that receives information indicating that the terminal has entered a geofence set based on a number of terminals in a certain area or weights of mobile objects associated with the terminals in the certain area;
• and
• an alarmer that outputs an alarm when the information is received.

An information processing method, comprising:

• obtaining, by an information processing apparatus, a number of terminals in a certain area or weights of mobile objects associated with the terminals in the certain area;
• and
• determining, by the information processing apparatus, whether to generate a geofence in accordance with whether at least one of the number of terminals and the weights of the mobile objects exceeds a certain threshold.

An alarm method, comprising:

• receiving, by a terminal, information indicating that the terminal has entered a geofence set based on a number of terminals in a certain area or weights of mobile objects associated with the terminals in the certain area;
• and
• outputting, by the terminal, an alarm when the information is received.

An information processing system, comprising:

• a plurality of terminals, wherein:
• the information processing system obtains a number of terminals in a certain area and weights of mobile objects associated with the terminals in the certain area and determines whether to generate a geofence in accordance with whether at least one of the number of terminals and the weights of the mobile objects exceeds a certain threshold.