1. Faculty of Social Welfare Nihon Fukushi University Mihama Japan
2. Center for Well‐being and Society Nihon Fukushi University Mihama Japan
3. Department of Oral Health Promotion Tokyo Medical and Dental University Tokyo Japan
4. Department of Epidemiology and Public Health University College London London UK
5. Department of Health Policy Science, Graduate School of Medical Science Yamagata University Yamagata Japan
6. Department of International and Community Oral Health Tohoku University Graduate School of Dentistry Sendai Japan
7. Faculty of Health and Sport Sciences, University of Tsukuba Tokyo Japan
8. Cancer Control Center Osaka International Cancer Institute Osaka Japan
9. Department of Social Science National Center for Geriatrics and Gerontology Obu Japan
10. Center for Preventive Medical Sciences Chiba University Chiba Japan