A user apparatus includes processing modules that execute processing using basic area information, and an area information supply module that supplies basic area information to the processing modules. The area information supply module includes an event detection unit that detects an event, an area information acquisition unit that acquires basic area information in accordance with an event being detected, and an area information notification unit that notifies the processing modules of the basic area information. The area information acquisition unit acquires detailed area information in accordance with a request signal being received. The area information notification unit notifies a processing module of the detailed area information.