- 2023/04 - 現在 Yamato University Faculty of Informatics
- 2022/04 - 現在 Osaka University, Center for Mathematical Modeling and Data Science
- 2022/04 - 現在 Osaka University
- 2022/04 - 2023/03 Yamato University Faculty of Political Science and Economics Professor
- 2016/04 - 2022/03 Osaka University, institute of Datability Science Professor
- 2014/04 - 2022/03 Osaka University, Center for Mathematical Modeling and Data Science Professor
- 2006/04 - 2022/03 Osaka University, Graduate School of Engineering, Department of Management of Industry and Technology Professor
- 2002/05 - 2022/03 Osaka University, Graduate School of Economics, Department of Business and Management Professor
- 2015/08 - 2020/08 Osaka University Vice Director
- 2013/08 - 2015/08 Osaka University, Graduate School of Economics Dean
- 2006/04 - 2014/03 Osaka University, Center for the Study of Finance and Insurance Professor
- 2010/04 - 2013/08 Osaka University, Graduate School of Economics Vice Dean
- 2010/08 - 2012/07 Osaka University, Center for the Study of Finance and Insurance Director
- 2006/08 - 2010/07 Osaka University, Center for the Study of Finance and Insurance Vice Director
- 2005/04 - 2010/03 Osaka University, Graduate School of Information Science and Technology, Department of Information and Physical Sciences Professor
- 2002/10 - 2005/09 Kyoto University, Graduate School of Economics Professor
- 1998/04 - 2002/04 Osaka University, Graduate School of Economics, Department of Business and Management Associate Professor
- 1996/10 - 1998/03 Osaka University, Faculty of Economics, Department of Business and Management Associate Professor
- 1992/04 - 1996/09 Tohoku University, Faculty of Economics, Department of Business Administration Associate Professor
- 1983/04 - 1992/03 Kyoto University, Faculty of Engineering, Department of Applied Mathematics and Physiscs Assistant Professor