Dr. Hiroki Shimura is a professor of Department of Laboratory Medicine and Director of Department of Thyroid Ultrasound Examination, Radiation Medical Science Center for the Fukushima Health Management Survey. He graduated from Yamanashi Medical University, School of Medicine in 1986 and completed PhD decree of Endocrinology and Metabolism in Postgraduate School of Yamanashi Medical University in 1990. After joining Prof. Kohn's lab in NIH (USA) for three years, he worked in education, research and medical care of endocrine and metabolic disease at Third Department of Internal Medicine in University of Yamanashi. He served as a professor at Department of Laboratory Medicine and involved in Thyroid Ultrasound Examination program since 2013. From 2018, he is also serving as the director of Department of Thyroid Ultrasound Examination in Radiation Medical Science Center for the Fukushima Health Management Survey.