Hiroshi Kunugi graduated from the University of Tokyo, Faculty of Medicine, in 1986 and started training in clinical psychiatry at Teikyo University School of Medicine, Tokyo. In 1991, he obtained a qualification as a certified psychiatrist from the Ministry of Health and Welfare, Japan, and started to work as a research associate in the Department of Psychiatry at Teikyo University School of Medicine. He obtained a Ph.D. from the University of Tokyo in 1994 and then studied molecular genetics in the Department of Psychological Medicine at the Institute of Psychiatry, London, until 1995. In 1998, he was promoted to Assistant Professor in the Department of Psychiatry, Teikyo University School of Medicine. In 2002, he was appointed Director of the Department of Mental Disorder Research, National Institute of Neuroscience, National Center of Neurology and Psychiatry, Tokyo, Japan. In 2020, he moved to Teikyo University School of Medicine as a Professor in the Department of Psychiatry. In 2021, he was appointed Professor and Chairman of the Department and Teikyo University Hospital. His research interests include the biology of schizophrenia, bipolar disorder, and depression, and particularly nutrition in these illnesses.