- 2024/04 - 現在 Port and Airport Research Institute (PARI), National Research and Development Agency National Institute of Maritime, Port and Aviation Technology (Concurrent) Distinguished Researcher
- 2024/04 - 現在 Port and Airport Research Institute (PARI), National Research and Development Agency National Institute of Maritime, Port and Aviation Technology Senior Director for Research
- 2021/07 - 現在 Port and Airport Research Institute (PARI), National Research and Development Agency National Institute of Maritime, Port and Aviation Technology Ocean Infrastructure and Offshore Wind Energy Research Center (Concurrent) Director General
- 2021/07 - 2024/03 Port and Airport Research Institute (PARI), National Research and Development Agency National Institute of Maritime, Port and Aviation Technology Coastal and Ocean Development Department Director
- 2017/10 - 2021/06 Port and Airport Research Institute (PARI), National Research and Development Agency National Institute of Maritime, Port and Aviation Technology Ocean Infrastructure and Offshore Wind Energy Research Center (Concurrent) Principal Researcher
- 2017/04 - 2021/06 Port and Airport Research Institute (PARI), National Research and Development Agency National Institute of Maritime, Port and Aviation Technology Coastal and Ocean Engineering Department Director
- 2016/04 - 2017/09 Port and Airport Research Institute (PARI), National Research and Development Agency National Institute of Maritime, Port and Aviation Technology Ocean Infrastructure Research Center (Concurrent) Principal Researcher
- 2016/04 - 2017/03 Port and Airport Research Institute (PARI), National Research and Development Agency National Institute of Maritime, Port and Aviation Technology Coastal and Ocean Development Group, Coastal and Ocean Engineering Department Group Leader
- 2014/04 - 2016/03 Independent Administrative Institution Port and Airport Research Institute (PARI) Ocean Infrastructure Research Center (Concurrent) Principal Researcher
- 2012/07 - 2016/03 Independent Administrative Institution Port and Airport Research Institute (PARI) Coastal and Ocean Development Group, Coastal and Ocean Engineering Department Group Leader
- 2010/04 - 2012/06 Kanto Regional Development Bureau, Ministry of Land, Infrastructure, Transport and Tourism Yokohama Research and Engineering Office for Port and Airport Head
- 2009/11 - 2010/03 Kanto Regional Development Bureau, Ministry of Land, Infrastructure, Transport and Tourism Yokohama Research and Engineering Office for Port and Airport Senior Construction Manager
- 2008/04 - 2009/10 Independent Administrative Institution Port and Airport Research Institute (PARI) Marine Environment and Engineering Department Research Director
- 2006/04 - 2008/03 Independent Administrative Institution Port and Airport Research Institute (PARI) Geotechnical and Structural Engineering Department (Concurrent) Research Group Leader
- 2003/04 - 2008/03 Independent Administrative Institution Port and Airport Research Institute (PARI) Offshore Structures Division, Geotechnical and Structural Engineering Department Head
- 2001/04 - 2003/03 Independent Administrative Institution Port and Airport Research Institute (PARI) Geotechnical and Structural Engineering Department Senior Researcher
- 2001/01 - 2001/03 Port and Harbour Research Institute (PHRI), Ministry of Land, Infrastructure and Transport Structural Engineering Division Senior Research Engineer
- 1998/09 - 2000/12 Port and Harbour Research Institute (PHRI), Ministry of Transport Structural Engineering Division Senior Research Engineer
- 1997/09 - 1998/08 Norwegian University of Science and Technology (NTNU) Department of Civil and Transport Engineering Visiting Researcher
- 1997/04 - 1997/08 Port and Harbour Research Institute (PHRI), Ministry of Transport Structural Engineering Division Senior Research Engineer
- 1991/04 - 1997/03 Port and Harbour Research Institute (PHRI), Ministry of Transport Offshore Structures Laboratory, Structural Engineering Division Research Engineer