2014.05-date Assistant Professor, Radiation Oncology, Clinical Medicine, Faculty of Medicine, University of Tsukuba 2011.04-2014.04　Researcher, Research Center for Charged Particle Therapy National Institute of Radiological Sciences (NIRS) 2008.04-2011.03　Postdoctoral Fellow, Heavy-Ion Radiobiological Research Group, National Institute of Radiological Sciences (NIRS) 2007.04-2008.03　Junior Researcher Associate, Heavy-Ion Radiobiological Research Group, National Institute of Radiological Sciences (NIRS) 2006.04-2007.03　Assistant, Heavy-Ion Radiobiological Research Group, National Institute of Radiological Sciences (NIRS) 2004.04-2006.03　Radiological Technologist, Hospital of Research Center for Charged Particle Therapy, National Institute of Radiological Sciences (NIRS)