All subjects must attend scheduled visits at the Baseline Visit and Weeks 2, 4, 8, 12, 16, 20, and 24, totaling 180 days. Aripiprazole once monthly injections will occur at the Baseline Visit and every 28 ( -2, +5) days at Weeks 4, 8, 12, 16, 20, and 24, totaling seven injections. After the initial injection of 400 mg, the monthly dosage can be decreased to 300 mg, based on the clinical judgment of the investigator. All aripiprazole once monthly injections will be administered based on the investigator's judgment and the prescribing information.