Takehiko Tosha is Professor of graduate school of science, University of Hyogo, Japan. He received his Ph.D. from Kyoto University in 2003, supervised by Prof. Isao Morishima. As a postdoctoral researcher, he worked at the Okazaki Institute of Integrative Bioscience (Prof. Teizo Kitagawa's group), at the Children’s Hospital Oakland Research Institute (Prof. Elizabeth Theil's group ), USA and at RIKEN SPring-8 center (Prof. Yoshitsugu Shiro's group), where he studied in the mechanism of enzymatic nitric oxide reduction using time-resolved X-ray crystallography at XFEL facility, SACLA, and time-resolved spectroscopic techniques, as a senior research scientist. His research interests include molecular mechanisms of metalloprotein-catalyzed reactions and structural dynamics of proteins related to metals in biology.