A driving characteristics diagnosis device, includes: an information acquisition unit that acquires information relating to the operational state of a vehicle; a dangerous driving detection processing unit that detects dangerous driving by a user of the vehicle on the basis of information acquired by the information acquisition unit; a cause estimation processing unit 126 that estimates a cause of the dangerous driving; a driving characteristics diagnosis processing unit 128 that performs diagnosis of driving characteristics for the user on the basis of a result of detection of the dangerous driving by the dangerous driving detection processing unit 125 and the cause of the dangerous driving estimated by the cause estimation processing unit 126; and a diagnosis result output unit that outputs the result of the diagnosis of driving characteristics diagnosed by the driving characteristics diagnosis processing unit.
DRIVING CHARACTERISTICS DIAGNOSIS DEVICE, DRIVING CHARACTERISTICS DIAGNOSIS SYSTEM, DRIVING CHARACTERISTICS DIAGNOSIS METHOD, INFORMATION OUTPUT DEVICE, AND INFORMATION OUTPUT METHOD