Inclusion Criteria:  ≥ 30 years old Type 2 diabetes by American Diabetes Association criteria HbA1c: 6.5% ≤ - < 10.0% Systolic blood pressure: 140 ≤ - < 180 mmHg or Diastolic blood pressure: 85 ≤ - < 110 mmHg Statin (-) or no change in low to moderate intensity statin [14] dose in recent 3 months  Exclusion Criteria:  Contraindication of olmesartan or amlodipine History of RAS inhibitors (ACE inhibitors or ARBs) or calcium channel blockers in the previous 3 months Pregnant women, women with potential of pregnancy not using adequate contraception method as evaluated by the investigator, lactating women Type 1 diabetes or diabetes secondary to chronic pancreatitis or to pancreatectomy Confirmed cardiovascular disease (acute coronary syndrome, stroke, or transient ischemic attack) within 3 months of screening Chronic hepatitis B or C (except healthy carrier of HBV), liver disease (AST/ALT > 3-fold the upper limit of normal) Chronic kidney disease (serum creatinine > 2.0 mg/dL) Hyperkalemia serum potassium >5.0 mEq/L Any previous cancer within 5 years (except squamous cell cancer, cervical cancer, thyroid cancer with appropriate treatment) except thyroid cancer or carcinoma in situ