Hitoshi Shirakawa obtained his Ph.D. from Tohoku University, Japan, in 1996. He is a professor at the Laboratory of Nutrition, Graduate School of Agricultural Science, Tohoku University, Japan. His research interests mainly focus on the modulation of intracellular signaling by nutrients and other food ingredients, especially on the alternation of the inflammatory response and steroidogenesis by vitamin K, biotin, isoprenoids, and other food ingredients. He also investigates the effects of fermented rice/wheat bran extract on the prevention of lifestyle-related diseases and identifies novel functional ingredients from fermented materials.