1. Patients must not have received antiviral therapy for their chronic hepatitis B. Patients who are expected to need systemic antiviral therapy other than that provided by the study at any time during their participation in the study are also excluded. Exception: patients who have had less than 6 months treatment of NA(Nucleos(t)ide analog) and more than 1 year wash-out period for systemic antiviral therapy and negative results in the NA resistance test at baseline are not excluded.