- 2022/04 - 現在 Dept. of Biosciences and Informatics, Keio University Professor
- 2017/04 - 現在 Yamaguchi University Graduate School of Medicine 医学系研究科 Part-time teacher
- 2007/04 - 現在 The Systems Biology Institute(SBI) Visiting Scientist
- 2020/08 - 2023/03 Gunma University Center for Mathematics and Data Science Visiting Professor
- 2009/04 - 2022/03 Associate Professor, Dept. of Biosciences and Informatics, Keio University
- 2015/08 - 2019/08 Okinawa Institute of Science and Technology Graduate University (OIST) Distinguished Lecturer
- 2007/04 - 2009/03 Dept. of Biosciences and Informatics, Keio University Assistant Professor
- 2004/04 - 2007/03 Lecturer, Dept. of Biosciences and Informatics, Keio University
- 2004/04 - 2007/03 Researcher, The Systems Biology Institute
- 2002/04 - 2007/03 Researcher, ERATO-SORST Kitano Symbiotic Systems Project, JST
- 2004/04 - 2005/03 Lecturer, Dept. of Electrical Engineering and Bioscience, Waseda University
- 2000/05 - 2002/03 Research Associate, Department of Information Technology, Mie University
- 1997/04 - 2000/03 Research Fellow, Japan Society of the Promotion of Science (DC1)