1. Committee for the Formulation of Medical Management Guide for Pediatric Congenital Hydronephrosis (ureteropelvic junction obstruction) Academic Committee, Japanese Society of Pediatric Urology Osaka Japan
2. Department of Pediatric Surgery Kanazawa Medical University Ishikawa Japan
3. Department of Pediatrics Toranomon Hospital Tokyo Japan
4. Department of Urology Fukushima Medical University School of Medicine Fukushima Japan
5. Department of Urology Tokyo Women’s Medical University Tokyo Japan
6. Department of Urology Shiga University of Medical Science Otsu Shiga Japan
7. Department of Urology Hyogo Prefectural Kobe Children’s Hospital Kobe Hyogo Japan
8. Department of Nephro‐Urology Nagoya City University Graduate School of Medical Sciences Nagoya Aichi Japan
9. Department of Urology Saga Medical School Faculty of Medicine, Saga University Saga Japan
10. Department of Renal and Genitourinary Surgery Hokkaido University Graduate School of Medicine Sapporo Hokkaido Japan
11. Department of Pediatric Nephrology Tokyo Women’s Medical University Tokyo Japan
12. Department of Pediatric‐Urology Nagoya City University Graduate School of Medical Sciences Nagoya Aichi Japan
13. Department of Pediatric Surgery Niigata University Graduate School of Medical and Dental Sciences Niigata Japan