1. Setsu Shimanouchi is a Professor, Community Health Nursing, Department of Nursing Science, School of Allied Health Sciences, Tokyo Medical and Dental University, Tokyo, Japan. Tomoko Kamei is an Associate Professor, Gerontological Nursing, St. Luke's College of Nursing, Chuo‐ku, Tokyo, Japan. Masayuki Hayashi is a Professor, Department of Epidemiology and Information Science, Fukushima College of Nursing, Fukushima‐shi, Fukushima, Japan.