Prof. Hiroki Shirato graduated from Hokkaido University School of Medicine in Sapporo Japan in 1981. He was board certified in Radiation Oncology in Japan in 1989. After receiving a fellowship for pion therapy at the Cancer Control Agency of British Columbia and TRIUMF, Vancouver, Canada in 1986, he trained at Department of Clinical Oncology, Christie Hospital conducting biomedical research with Paterson Institute, Manchester, United Kingdom in 1987. He obtained his PhD in 1988 from Hokkaido University for biophysical research in pion therapy. Prof. Shirato’s interest in high-precision radiotherapy led him to invent the real-time tumor-tracking radiotherapy system in 1999 and the real-time-image gated proton therapy in 2013, and he collaborates with biologist, physicists, engineers, and industry in translational research globally. Scientific papers regarding stereotactic radiotherapy, image-guidance, internal organ motion, biophysical model, and four-dimensional radiotherapy have been cited worldwide. He received the Japan Academy Prize and the JASTRO Gold Medal in 2022, the Japan Medical Research and Development Award in 2021, the Imperial Invention Award in 2017, and Research Front (Thomson Reuters) in 2007. He has been full professor at Hokkaido University Faculty of Medicine since 2006 until now, had been Chairman of Department of Radiation Oncology from 2006 to 2019. He is the first director of Proton Beam Therapy Center, the first director of Global Center for Biomedical Science and Engineering, and the first Dean of Graduate School of Biomedical Science and Engineering in Hokkaido University. He has been the Vice-Chairman of Japanese Organization of Radiotherapy Quality Management since 2019. He had been a member of the board of JASTRO from 2010 to 2018, is also the former Chairman of the JASTRO Particle Beam Therapy Committee, and the former Representative Director of Japanese Board for Medical Physicist Qualification. He worked as the program leader in the IEC TC62/SC62C to publish TR 62926:2019, guidelines for safe integration and operation of adaptive external-beam radiotherapy systems for real-time adaptive radiotherapy. He has been a member of the committee for the new ICRU report on Prescribing, Recording, and Reporting Proton-Beam Therapy since 2022. Prof. Shirato was elected to the Commission in 2023.