1. Department of Neuropsychiatry, Graduate School of Medical Sciences, Kyushu University
2. Mood Disorder & Hikikomori Clinic, Kyushu University Hospital
3. Hikikomori Research Lab, Kyushu University, Fukuoka, Japan
4. Association for the Improvement of Mental Health Programs, Geneva, Switzerland
5. Kobe University School of Medicine, Kobe, Japan