This is a multicenter, open-label, long-term, extension, phase 3 study to evaluate the safety and efficacy of long-term administration of TVP-1012 at 1 mg for another 26 weeks in participants with early Parkinson's disease who have completed the preceding TVP-1012/CCT-001 (NCT02337725) study.~Among participants of the TVP-1012/CCT-001 study, those consenting to participate in this study prior to complete the preceding study and fulfilling the eligibility criteria will be enrolled in this study. From the day after the Visit 8 of the preceding study, participants will receive 1 mg of TVP-1012 once daily for 26 weeks in an unblinded manner.
The purpose of this study is to evaluate the long-term safety of TVP-1012 (1 mg/day) in Japanese participants with early Parkinson's disease.