Abstract: A navigation simulator includes a memory in which a computer program is stored and a processor coupled to the memory. The processor performs processing by executing the computer program. The processing includes acquiring, from an external device, a test scenario including a simulator built-in sensor signal. The simulator built-in sensor signal represents motion information detected by a simulator built-in sensor when a vehicle drives on a preset driving route. The simulator built-in sensor is installed in the navigation simulator. The processing includes generating an emulated sensor signal obtained by emulating a car navigator built-in sensor signal on the basis of the simulator built-in sensor signal included in the test scenario. The car navigator built-in sensor signal represents motion information detected by a car navigator built-in sensor installed in a car navigation system. The processing includes outputting the generated emulated sensor signal to the car navigation system.