Born in Osaka in 1957. Graduated from Keio University School of Medicine in 1983. Internship at the Keio University Hospital and affiliated hospitals (1983-85). Residency in general surgery and Clinical fellow in thoracic surgery at the National Cancer Center Hospital (1986-91). Attending surgeon (Thoracic surgery, 1992-1998), Chief of Thoracic Surgery (1992-2014), and Deputy Director-Hospital (2012-2014) at the National Cancer Center Hospital, Tokyo. Professor of Surgery, Chief, Division of Thoracic Surgery, Keio University School of Medicine (2014-present). Visiting Professor at the Kyorin University in Tokyo (2007-2013) and at the Seoul National University in Seoul, Korea (1999-preseent). Doctor of Medical Science degree from Keio University in 1997.
Chair of Staging Committee (IASLC). Executive Board Director and Chair of the Committee for General Rules of Pathological and Clinical Record for Lung Cancer (Japan Lung Cancer Society). Chair, TNM Committee (Japan UICC Committee) and member of TNM Prognostic Factors Core Group, UICC, Geneva. A Congress President for 58th World Conference on Lung Cancer in Yokohama 2017 by IASLC.