I am currently a professor and Chairman in Radiation Oncology, Faculty of Medicine, University of Tsukuba, and also Director in Proton Beam Therapy Center, University of Tsukuba Hospital. I have been holding leadership, supervisory and administrative positions in particle therapy research in Japanese Society of Radiation Oncology (JASTRO), because I am chair of particle therapy committee in JASTRO. In addition, brachytherapy, hyperthermia and boron neutron capture therapy are also my special interest.