Dr. Tsutsui was awarded his Ph.D. degree from Waseda University, Japan in 1981 and joined the Faculty of Integrated Arts and Sciences, Hiroshima University, Japan. He became Professor at the Faculty of Integrated Arts and Sciences, Hiroshima University in 1996 and Director of Center for Integrative Brain Sciences at Hiroshima University in 2000. He recently joined as Professor the Department of Biology, Waseda University in 2006. Dr. Tsutsui has established himself as one of the leaders in the fields of Endocrinology and Neuroendocrinology by his distinguished academic career. He has contributed to the advancement of Endocrinology and Neuroendocrinology by a series of his studies over the past four decades by focusing on the discovery of novel neurosteroids and neuropeptides, and the demonstration of their mode of actions and functional significances. Dr. Tsutsui first found de novo neurosteroidogenesis in the avian brain from cholesterol and subsequently demonstrated the biosynthetic pathway of neurosteroids using quail. Dr. Tsutsui is also known as the discoverer of gonadotropin-inhibitory hormone (GnIH). Gonadotropin-releasing hormone (GnRH) is known to be the primary factor responsible for the hypothalamic control of gonadotropin secretion. However, Dr. Tsutsui discovered GnIH as a novel hypothalamic neurohormone. Dr. Tsutsui has published an impressive set of over 400 papers in first rank journals including Nature Medicine, Nature Communications, Proc. Natl. Acad. Sci. USA, Frontiers in Neuroendocrinology, Progress in Neurobiology, Mass Spectrometry Reviews, Endocrinology, J. Neuroendocrinol., J. Molecular Endocrinology, J. Neuroscience, J. Neurochemistry, Molecular Neurobiology, Biochemical J., FASEB J., British J. Pharmacology, Scientific Reports, etc. Tsutsui’s h-index is 62. Dr. Tsutsui was awarded Zoological Society Prize, Farner Medal, Yoshimura Prize, Bargmann-Scharrer Award, Prize for Science and Technology, Okuma Prize for Science and Technology, Kobayashi Award, Top Cited Certification from Journal of Molecular Endocrinology and others.

Dr. Tsutsui has been contributing the progress in the fields of Endocrinology and Neuroendocrinology by a series of his studies over the past four decades by focusing on the discovery of novel neurosteroids and neuropeptides, and the demonstration of their mode of actions and functional significances.