- 1982 - 1991 (財)エネルギー総合工学研究所 副主席研究員
- 1982 - 1991 Institute of Applied Energy, Senior Researcher
- 1980 - 1982 (財)未来工学研究所 主任研究員
- 1980 - 1982 Institute for Future Technology, senior Researcher
- 1978 - 1980 Hitachi, Ltd.,
- 1978 - 1980 Energy Research Lab., Hitachi Ltd., senior Researcher
- 1971 - 1976 Hitachi, Ltd.,
- 1971 - 1976 Atomic Energy Research Lab., Hitachi Ltd., senior Researcher
- 1970 - 1971 Hitachi, Ltd., Central Research Laboratory
- 1970 - 1971 Central Research Lab., Hitachi Ltd., senior Researcher
- 1961 - 1970 Hitachi, Ltd., Central Research Laboratory
- 1961 - 1970 Central Research Lab., Hitachi Ltd, Researcher
- 1968 - 1969 バテルメモリアル研究所 外来研究員
- 1968 - 1969 Battelle Memorial Institute Visiting Researcher