- 2020/04 - 現在 President, National Institute of Maritime, Port and Aviation Technology
- 2016/04 - 2020/03 Director General, Port and Airport Research Institute
- 2015/01 - 2016/03 Distinguished Researcher, Port and Airport Research Institute
- 2010/04 - 2014/12 Director for Marine Environment and Engineering Research, Port and Airport Research Institute
- 2001/04 - 2010/03 Head, Littoral Drift Laboratory, Port and Airport Research Institute
- 1998/04 - 2001/03 Head, Littoral Drift Laboratory, Port and Harbour Research Institute
- 1991/04 - 1998/04 Senior Research Engineer, Marine Environment Department, Port and Harbour Research Institute
- 1983/04 - 1991/03 Research Engineer, Littoral Drift Division, Port and Harbour Research Institute
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