- 2024/04 - 現在 National Institute of Polar Research Professor
- 2023/04 - 現在 Nagoya University Institute for Space and Earth Environmental Research Visiting Professor
- 2023/03 - 現在 National Institute of Polar Research International Polar and Earth Environmental Research Center Coordinator (concurrency)
- 2023/03 - 現在 National Institute of Polar Research Arctic Research Center (concurrency)
- 2022/04 - 現在 The Graduate University for Advanced Studies School of Multidisciplinary Sciences Department of Polar Science Professor
- 2022/04 - 現在 National Institute of Polar Research Advanced radar resarch promotion center Director
- 2019/10 - 現在 Research Organisation of Information and Systems, Joint Support-Center for Data Science Research Polar Environment Data Science Center (concurrency)
- 2019/04 - 現在 Research Organisation of Information and Systems, Joint Support-Center for Data Science Research Center for Data Assimilation Research and Applications (concurrency)
- 2022/04 - 2024/03 National Institute of Polar Research Professor
- 2022/04 - 2023/03 National Institute of Polar Research Arctic Environment Research Center
- 2014/04 - 2023/03 ISEE, Nagoya University, Japan. Visiting associate professor
- 2012/11 - 2022/03 The Graduate University for Advanced Studies (SOKENDAI) Department of Polar Science Associate professor
- 2012/11 - 2022/03 National Institute of Polar Research, Japan Associate professor
- 2006/04 - 2012/11 National Institute of Polar Research, Japan Lecturer
- 2006/04 - 2012/11 The Graduate University for Advanced Studies (SOKENDAI) Department of Polar Science Lecturer
- 2003/04 - 2006/04 STEL, Nagoya University, Japan. Assistant professor
- 2002/04 - 2003/03 Swedish Institute of Space Physics (IRF), Sweden Post-doc
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