Dr. Taisuke Boku received his Master and PhD degrees from Keio University. After his career as assistant professor at Keio University, he joined the Center for Computational Sciences (former Center for Computational Physics) at the University of Tsukuba where he is currently Deputy Director, HPC Division Leader and System Manager of Supercomputing Resources. He has been working there more than 20 years on HPC system architecture, system software, and performance evaluation of various scientific applications. In these years, he has been playing the central role of system development on CP-PACS (ranked as number one in ToP500 in 1996), FIRST (hybrid cluster with gravity accelerator), PACS-CS (bandwidth-aware cluster) and HA-PACS (high-density GPU cluster) as the representative for supercomputers in Japan. Also, he is a member of system architecture working group of Post-K computer development. He is a coauthor of the ACM Gordon Bell Prize in 2011.