Prof. Dr. Atsushi Nakajima is a Professor and Chairman of the Department of Gastroenterology and Hepatology, and Director of the Advanced Medical Research Center at the Yokohama City University(YCU), Japan. He graduated from the Osaka University School of Medicine in 1989 and became an Assistant Professor of the 3rd Department of Internal Medicine, Faculty of Medicine, University of Tokyo in 1997. He was also a Visiting Associate Professor at the GI Division of Brigham and Women’s Hospital, Harvard Medical School. His research interests mainly focus on Obesity, Gastrointestinal diseases, especially non-alcoholic steatohepatitis, the new drug application for NASH, and studies to reveal the disease entity of NASH/NAFLD.