Based on a user operation on an operation unit, an operation target is controlled in a virtual space, and it is determined whether or not the operation target is in a predetermined situation in the virtual space. Then, a vibration signal for vibrating a vibration unit is generated in accordance with the state of the operation target in the virtual space, and the vibration signal is generated by associating a plurality of types of vibrations with a plurality of states of the operation target. When it is determined that the operation target is in the predetermined situation, the vibration signal is generated so that regarding a first type of vibration among the plurality of types of vibrations, the vibration is weaker than in a case where it is not determined that the operation target is in the predetermined situation, or the vibration disappears.