Study of CS-3150 in Patients With Essential Hypertension

Inclusion Criteria: * Male and female subjects aged 20 years or older at informed consent * Subjects with essential hypertension satisfying the following blood pressure criteria; * Sitting SBP: ≥ 140 mmHg and \< 180 mmHg * Sitting DBP: ≥ 90 mmHg and \< 110 mmHg * Mean 24 hr BP: SBP ≥ 130 and DBP ≥ 80 mmHg Exclusion Criteria: * Secondary hypertension or malignant hypertension * Diabetic nephropathy or diabetes mellitus with albuminuria * Serum potassium level \< 3.5 or ≥ 5.1 mEq/L * Reversed day-night life cycle including overnight workers * eGFR \< 60 mL/min/1.73 m\^2