- 2005 - 2008 Kyushu Institute of Technology Department of Electrical Engineering Associate Professor
- 2008 - Kyushu Institute of Technology, Graduate School of Engineering Department of Electrical and Electronic Engineering Associate Professor
- 2003 - 2005 財団法人 福岡県産業・科学技術振興財団福岡知的クラスター研究所 研究員
- 2003 - 2005 Researcher, Fukuoka Laboratory for Emerging & Enabling Technology of SoC, Fukuoka Industry, Science & Technology Foundation
- 2002 - 2003 Kyushu University Medical Institute of Bioregulation
- 2000 - 2001 University of California at Berkeley Department of Electrical Engineering and Computer Sciences Visiting Scholar
- 1999 - 2000 Kyushu University Faculty of Information Science and Electrical Engineering
- 1999 - 2000 Associate Professor, Graduate School of Information Science and Electrical Engineering ,Kyushu University
- 1997 - 1999 Kyushu University School of Engineering
- 1997 - 1999 Associate Professor, Faculty of Engineering, Kyushu University
- 1991 - 1997 Kyushu University School of Engineering
- 1991 - 1997 Research Associate, Faculty of Engineering, Kyushu University
- 1987 - 1991 Hitachi Ltd. Hitachi Research Laboratory
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