A Study of Molidustat for Maintenance Treatment of Renal Anemia in Non-dialysis Subjects

Inclusion Criteria: * Subjects with estimated glomerular filtration rate (eGFR)\< 60 mL/min/1.73m\^2 (Chronic kidney disease \[CKD\] stages 3 to 5) * Have used the same ESA for 8 weeks prior to screening * Treated with darbepoetin alfa with bi-weekly or monthly dose, epoetin beta pegol with monthly, OR epoetin alfa/beta weekly or bi-weekly, and having had no more than one dose change within 8 weeks prior to randomization * Body weight \> 40 and ≤ 160 kg at screening * Male or female subject ≥ 20 years of age at screening * Not on dialysis and not expected to start dialysis during the study period * Mean screening Hb level ≥ 10.0 and \< 13.0 g/dL (mean of all central laboratory Hb levels \[at least 2 measurements must be taken ≥ 2 days apart\] during the 8-week screening period, AND all Hb level must be measured by the central laboratory, AND the difference between the lowest level and highest level is \< 1.2 g/dL), with the last screening Hb level measurement within 14 days prior to randomization * Ferritin ≥ 100 ng/mL or Transferrin saturation ≥ 20% Exclusion Criteria: * New York Heart Association (NYHA) Class III or IV congestive heart failure * History of cardio- (cerebro-) vascular events (e.g., unstable angina, myocardial infarction, stroke, pulmonary thromboembolism, and acute limb ischemia) within 6 months prior to randomization * Sustained and poorly controlled arterial hypertension (defined as systolic BP (blood pressure)≥ 180mmHg or diastolic BP ≥ 110mmHg) or hypotension (defined as systolic BP \< 90mmHg) at randomization * Proliferative choroidal or retinal disease, such as neovascular age-related macular degeneration or proliferative diabetic retinopathy requiring invasive treatment (e.g., intraocular injections or laser photocoagulation)