1. Division of Health Care Research, Behavioral Science and Survivorship Research Group, Center for Public Health Sciences National Cancer Center Japan Tokyo Japan
2. Clinical Psychology Course, Department of Psycho‐Social Studies, School of Arts and Letters Meiji University Tokyo Japan
3. School of Distance Learning, Department of Human Sciences Musashino University Tokyo Japan
4. Department of Psychiatry and Cognitive‐Behavioral Medicine Nagoya City University Graduate School of Medical Sciences Nagoya Japan
5. Department of Neuropsychiatry Sapporo Medical University Graduate School of Medicine Sapporo Japan
6. Innovation Center for Supportive, Palliative and Psychosocial Care National Cancer Center Hospital Tokyo Japan