Dr. Toshiyuki Shirai is the Director of the Department of Accelerator and Medical Physics at the National Institutes for Quantum and Radiological Science and Technology (QST). He received his PhD degree from the Faculty of Science, Kyoto University. After graduation, he worked in the accelerator and beam physics at the Institute for Chemical Research, Kyoto University. At QST, his research interests are in medical physics and medical accelerators for particle therapy, especially carbon-ion radiotherapy. He has served as a Councilor of the Particle Accelerator Society of Japan. Dr. Teiji Nishio is Professor and Director of the Medical Physics Laboratory, Division of Health Science, Graduate School of Medicine, Osaka University, Osaka, Japan. He received his Ph.D. in Science from the Department of Physics, Graduate School of Science, Rikkyo University for his research in nuclear astrophysics. He also received his Ph.D. in Medicine from the Department of Biophysics and Medicine, Graduate School of Medicine, The University of Tokyo for his research in medical physics. So far, he has been working on research and development of proton therapy, especially, Beam On-Line PET system, which visualize the proton irradiation area, at the National Cancer Center Japan. He is currently engaged in research and education on X-ray therapy, proton therapy, and heavy particle therapy in the Medical Physics Laboratory at Osaka University. He is also a board member of the Japan Society of Medical Physics (JSMP). Kiyokazu Sato is the Senior Consultant of Keihin Product Operations Toshiba Energy Systems & Solutions Corporation. He is responsible for improving technologies and the quality of Keihin Product Operations which is the core factory in Toshiba for energy related equipments such as steam and hydro turbines, turbine-generators, heat exchangers, nuclear reactor internals and new energy equipment. Prior to his current role, he was the Senior Manager of Machinery and Equipment Department and in charge of designing and fabricating new energy equipment such as particle accelerators, superconducting magnets, equipment for fusion reactors, and special remote handling systems. Dr. Sato holds a PhD in Engineering for his work on heavy ion linear accelerators from Tokyo Institute of Technology, Tokyo, Japan.