Received: 14 October 2021
Accepted: 28 March 2022
First Online: 23 April 2022
: The study plan and all related documents were approved by the Ethical Committee of Tokyo Metropolitan Institute of Gerontology: approval numbers are 28-3962-67 for the intervention and 28-1042-9 for the surveys. We conducted this study conforming to the ethical principles stated in the Declaration of Helsinki. We complied with the Ethical Guidelines for Medical and Biological Research Involving Human Subjects [CitationRef removed] for ethical procedures and obtained informed consent from all participants. For the older adults who participated in the intervention activities, information regarding the study’s overview and data collection was exhibited at the café entrance. Consent was obtained in the form of an opt-out option. For the postal surveys, we sent out a document that explained in detail information on the surveys, including the purpose of the surveys and how personal information would be treated. The survey responses were anonymous and responding to the surveys implied consent.
: Not applicable.
: The authors declare that there is no conflict of interest.