- 2014/04 - 現在 Hookaido University of Science Civil and Environmental Engineering, Faculty of Engineering Professor
- 2008/04 - 2014/03 Hokkaido Institute of Technology The Faculty of Creative Engineering, Department of Civil and Environmental Engineering
- 2006/04 - 2008/03 Hokkaido Institute of Technology
- 2004/10 - 2006/03 Independent Administrative Institution Port and Airport Research Institute
- 2002/12 - 2004/10 財団法人沿岸開発技術研究センター研究主幹
- 2001/04 - 2002/11 Independent Administrative Institution Port and Airport Research Institute
- 2001/01 - 2001/03 Ministry of Land, Infrastructure, Transport and Tourism
- 1992/08 - 2001/01 運輸省港湾技術研究所構造部海洋構造研究室長
- 1985/04 - 1992/08 運輸省港湾技術研究所構造部主任研究官
- 1977/04 - 1985/03 運輸省港湾技術研究所構造部海洋構造研究室研究官
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