- 2012/04 - 2022/03 Meiji University Graduate School of Advanced Mathematical Sciences Associate Professor
- 2009/05 - 2012/03 Research Organization of Information and Systems The Institute of Statistical Mathematics Researcher
- 2008/02 - 2008/12 Russell Investments Japan Co., Ltd. Consulting Quantitative analyst
- 2007/07 - 2008/02 Barclays Global Investors Japan Limited Global Fixed Income Quantitative analyst
- 2004/10 - 2007/06 Research Organization of Information and Systems The Institute of Statistical Mathematics Project researcher
- 1999/12 - 2000/12 Merrill Lynch Japan Inc. Research Quantitative research Consultant
- 1994/09 - 1998/01 Smith Barney International Inc. Research Quantitative analyst
- 1992/07 - 1994/08 Barclays de Zoete Wedd Securities Limited Research Quantitative analyst
- 1990/06 - 1992/07 UBS Phillips and Drew International Limited Research Quantitative analyst
- 1990/01 - 1990/05 Merrill Lynch Japan Inc. Foreign exchange Accounting executive
- 1988/03 - 1989/12 Banque Indosuez Option dealer
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