Clinical Study of KDT-3594 in Healthy Adult Males and Patients With Parkinson's Disease

Inclusion Criteria: * Healthy volunteer part * Healthy Japanese males aged 20 to 35 years, inclusive * Patient part * Patients who are diagnosed with Parkinson's disease according to UK Parkinson's Disease society brain bank clinical diagnostic criteria * Patients with Parkinson's disease in Stages 1 to 3 on the Modified Hoehn and Yahr Scale * Male patients with Parkinson's disease aged 20 to 74 years inclusive, post-menopausal female patients with Parkinson's disease aged 50 to 74 years inclusive Exclusion Criteria: * Healthy volunteer part * Subjects with any abnormal findings in physical examination vital signs, 12-lead ECG, clinical laboratory tests, ophthalmic examinations and electroencephalography * Patient part * Patients who are suspected any parkinsonism except for idiopathic Parkinson's disease * Healthy volunteer part and patient part * Subjects who do not agree to avoid dangerous works such as driving, mechanical operation and high-place work until completion of the follow-up examination