Senior Researcher, National Institute of Population and Social Security Research

Professor Emeritus, Institute of Social Science, University of Tokyo

Department Director National Institute of Population and Social Security Research

Professor, Faculty of Letters, Department of Humanities and Social Sciences, Keio University

Professor, Institute of Social Science, University of Tokyo

Professor, Policy Studies, Nanzan University

Professor, Sociology, University of Tokyo and Senior Vice Rector of United Nations University

Assistant Professor, University of Pennsylvania