He received the B.E. degree in College of Information Sciences and the M.E degree in Doctoral Program in Engineering from University of Tsukuba, and the Ph.D. degree in Graduate School of Engineering from the University of Tokyo. His research interests include computer architecture, high performance computing, VLSI design, and embedded systems, with focusing on low-power and high-performance microprocessor design, power management for high performance cluster systems, and dependable cluster systems. He has engaged in many research projects as PI/Co-PI with research grants administrated by Japanese government (MEXT, JSPS, JST, and NEDO) and industry.