1.Hiromichi Ishiyama, Professor and Chairman, Department of Radiation Oncology, Kitasato University School of Medicine 2.Education: 1992-1998, M.D., Yamagata University School of Medicine, 1998-2000, Residency, Department of Radiology, Yamagata University School of Medicine, 2000-2001, Fellowship, Department of Radiology, Yamagata University School of Medicine, 2001-2002, Fellowship, Department of Radiology, Shinjo Hospital, Yamagata, Japan. 3.Working experience: 2002-2004, Assistant Professor, Department of Radiology, Yamagata University School of medicine, 2004-2009, Assistant Professor, Department of Radiology, Kitasato University School of Medicine, 2009-2011, Postdoctoral Fellow, Department of Radiation Oncology, the Methodist Hospital Institute, 2011-2012, Assistant Professor, Department of Radiology and Radiation Oncology, Kitasato University School of Medicine, 2012-2019, Junior Associate Professor, Department of Radiology and Radiation Oncology, Kitasato University School of Medicine, 2019-present, Professor and Chairman, Department of Radiology and Radiation Oncology, Kitasato University School of Medicine. 4.Current and previous research interests: radiation oncology; prostate cancer; brachytherapy. 5. Membership of academic societies: Japan Radiological Society, Japanese Society for Therapeutic Radiology and Oncology, European Society for Therapeutic Radiology and Oncology, American Society for Therapeutic Radiology and Oncology.