| 1983 | BSc. Agriculture, the University of Tokyo |
| 1987 | Ph.D. Agricultural Chemistry, the University of Tokyo |
| 1987 | Assistant Professor, the Tokyo University of Agriculture, |
| 2004 | Associate Professor, the Tokyo University of Agriculture, |
| 2006 | Associate Professor, the University of Tokyo |
| 2008 | Professor, the University of Tokyo |
| 2012 | Chair of Department of Radiation Protection, Soma-Chuo Hosipital |
| 2016 | Director, Research Institute of Innovative Medicine, Tokiwa Foundation |
| 2017 | Professor (Project), the Iwaki Meisei University |
| 2020 | Professor (Project), the Fukushima Medical University |