DRIVING ASSISTANCE DEVICE AND DRIVING ASSISTANCE METHOD

A driving assistance device includes a storage device storing a program and a hardware processor connected to the storage device. The hardware processor reads and executes the program stored in the storage device to recognize a risky physical object located near a mobile object on the basis of an output of a physical object detection device, cause at least one speaker to output a notification sound on the basis of a position of the risky physical object, and when the notification sound is output, cause the at least one speaker to output a first notification sound if the risky physical object is located in a first region including a region in front of the mobile object and cause the at least one speaker to output a second notification sound if the risky physical object is located in a second region including a region behind the mobile object. The first notification sound is a sound having a pitch different from that of the second notification sound.