Mitsuhisa Sato is a deputy Director of RIKEN Center for Computational Science, renamed from AICS, and a team leader of architecture development team in FLAGSHIP 2020 project to develop Japanese flagship supercomputer, Post-K, in RIKEN, since 2014. He received the M.S. degree and the Ph.D. degree in information science from the University of Tokyo in 1984 and 1990. From 2001, he was a professor of Graduate School of Systems and Information Engineering, University of Tsukuba. He has been working as a director of Center for computational sciences, University of Tsukuba from 2007 to 2013. Since October 2010, he is appointed to the research team leader of programming environment research team in Advanced Institute of Computational Science (AICS), RIKEN. He is a Professor Cooperative Graduate School Program) and Professor Emeritus of University of Tsukuba.