Mr. Toshiyuki Shimizu is Vice President of System Development Division, Next Generation Technical Computing Unit, at Fujitsu Limited. Mr. Shimizu started at Fujitsu Laboratories with the research and development of the AP1000 massively parallel supercomputer system, and he has been deeply and continuously involved in the development of scalar parallel supercomputers, large SMP enterprise servers, and x86 cluster systems. His primary research interest is in interconnect architecture, most recently culminating in the development of the Tofu interconnect for the K computer and PRIMEHPC series. He led the development of Fujitsu’s high-end supercomputer PRIMEHPC series, and is now engaged in developing the architecture and technology for the Post-K supercomputer. Mr. Shimizu received his Masters of Computer Science degree from Tokyo Institute of Technology in 1988.