Mitsuhisa Sato received the M.S. degree and the Ph.D. degree in information science from the University of Tokyo. He was a senior researcher at Electrotechnical Laboratory, and a chief of Parallel and distributed system performance laboratory in Real World Computing Partnership, Japan, from 1996 to 2001. Currently, he is a professor of Graduate School of Systems and Information Engineering, University of Tsukuba. He is a director of Center for Computational Sciences, University of Tsukuba since 2007. He is a research team leader on programming environment in AISC (Advanced institute of Computational Science) of RIKEN since 2010. His research interests include computer architecture, compilers and performance evaluation for parallel computer systems, OpenMP and parallel programming. Dr. Sato is a member of IEEE CS and IPSJ (the Information Processing Society of Japan), JSIAM. Dr. Sato is the key architect for the development of system software in post K supercomputer.