MD Shozo Osera's College/University: 1999-2005, MD, Tsukuba University, Ibaraki, Japan. 2013-2016, PhD, Jyuntendo University Graduate School of Medicine, Tokyo, Japan. Residency: 2005-2007, Rakuwakai Otowa Hospital, Kyoto, Japan; 2007-2008, Department of Gastroenterology, Saku Central Hospital, Nagano, Japan; 2008-2011, Department of Gastroenterology, Itabashi Chuo Medical Center, Tokyo, Japan; 2011-2016, Department of Gastroenterology and Endoscopy, National Cancer Center Hospital East, Chiba, Japana; 2016-Present, Department of Gastroenterology, Saku Central Hospital Advanced Care Center, Nagano, Japan.