Polypharmacy is a global challenge, and the involvement of patients and families is essential for its optimization. In this study, we validated the rPATD (the revised Patients' Attitude Towards Deprescribing), an internationally used index that measures the attitudes of patients and caregivers toward "reducing medication," in Japan and confirmed its applicability. For details, please see "TSUKUBA JOURNAL" on the University of Tsukuba website.