Yoshio Hosoi is a professor of Radiation Biology at Tohoku University. His work focuses specifically on the effects of hypoxia and nutrient starvation on DNA double-strand break repair enzymes such as ATM and DNA-PK, AMPK, PI3K pathway, and radiation sensitivity. He holds an M.D. and Ph.D. from Tohoku University and was a Postdoctoral Fellow at UCSF and SRI International.