Ken Watanabe is a Japanese–American astrophysicist at NASA's Goddard Space Flight Center. A member of the Laboratory for High energy Astrophysics in Greenbelt, he holds the rank of Senior Scientist. He is in charge of data production for the RXTE Guest Observer Facility. He received a B.S. in Physics from Tohoku University in 1987, an M.S., also in physics, from the University of Iowa in 1991, and his Ph.D., in the same subject, from Clenson University in 1996.
Watanabe's research centers on cosmic gamma-ray background, supernovae, active galactic nuclei, gamma-ray bursts, and cosmic chemical evolution. He has published over 16 peer reviewed articles and conference papers. His most cited paper is "The diffuse gamma-ray background from supernovae" by Watanabe, K., Hartmann, D.H., Leising, M.D., The, L.-S in Astrophysical Journal 516 (1 PART 1), pp. 285-296, with 25 cites according to Scopus.
He is currently a Physics I and II teacher at FGCU (Florida Gulf Coast University).