- 2007/04 - 2012/03 Research Institute of Environment, Agricuflture and Fisheries, Osaka Prefectural Government Director General
- 2003/04 - 2007/03 JSPS Bankok Office, Japan Society for the Promotion of Science Director
- 2001/04 - 2003/03 Department of Bioinfomatic Engineering, Graduate School of Information Science and Technology Professor
- 1995/04 - 2001/03 International Center for Biotechnology, Osaka University Professor
- 1995/04 - 1999/03 International Center for Biotechnology Director
- 1988/04 - 1995/03 International Center for Cooperative Research and Development in Microbial Engineering, Japan, Faculty of Engineering, Osaka University Professor
- 1978/06 - 1988/03 International Center for Cooperative Research and Development in Microbial Engineering, Japan, Faculty of Engineering, Osaka University Associate Professor
- 1971/06 - 1978/05 Deptment of Fermentation Technology, Faculty of Engineering, Osaka University Reasearch Associate
- 1972/08 - 1973/09 Department of Chemical Engineering, School of Engineering, University of Pennsilvania Postdoctoral Fellow
- 1969/03 - 1971/05 Department of Chemical Engineering, Faculty of Engineering, Osaka Prefecture University Research Associate