PhD. Johns Hopkins University, 1979 (Thesis supervisor, Sir Alan Walters, British Prime Minister Margaret Thatcher's Chief Economic Advisor)
Assistant Professor, State University of New York at Buffalo (1979-1981)
Associate Professor, GRIPS (1982-1990)
Professor, Faculty of Economics, Keio University (1991-2014)
Dean & CEO, Asian Development Bank Institute(ADBI) (2014-2020)
Visiting Professor, New South Wales University, Australia
visiting Professor, Sciences Po, Paris, France
Visiting Professor, Goteborg University, Sweden
Visiting Professor, Martin Luther University of Halle-Wittenberg, Germany
Visiting Professsor, University of Malaya, Kebansan (UKM), Malaysia
Visiting Scholar, MIT, USA
Visiting Scholar, Central Bank of Japan (Research Institute)
Visiting Professor, National Graduate Institute for Policy Studies (GRIPS, 2020-2023)
Visiting Lecturer, University of Tokyo, Graduate School of Public Policy, (2020-2022)
Green Finance Lifetime Achievement Award, 2021 (Central Award: European Green Finance Conference, Central Bank of Hungary, Planet Budapest Sustainable EXPO Summit, December 2021)
Republic of Palau (Member of Economic Advisory Group, 2022-present)
Professor Emeritus, Keio University (Economics) (2014-present)
Special Professor, Tokyo Metropolitan University (International Economics) (2023-Present)