DRIVING ASSISTANCE DEVICE AND DRIVING ASSISTANCE METHOD

A driving assistance device includes a storage device configured to store a program and a processor connected to the storage device. The processor executes the program stored in the storage device to acquire information about a target position decided on as a position relative to another moving object located in a second lane when a host moving object merges or changes lanes from a first lane to the second lane and cause a speaker to output a sound obtained by combining a basic sound for acceleration guidance with an additional sound for the acceleration guidance having a higher frequency than the basic sound for the acceleration guidance when the host moving object should accelerate such that position alignment related to a traveling direction of the host moving object is performed with respect to the target position.