- - 1979 Sophia University Graduate School of Philosophy
- - 1979 Sophia University Graduate School, Division of Philosophy
- - 1978 University of Toronto
- - 1978 University of Toronto Faculty of Sociology
- - 1974 Sophia University Graduate School of Theology
- - 1974 Sophia University Graduate School, Division of Theology
- - 1967 Sophia University Faculty of Humanities Department of Philosophy
- - 1967 Sophia University Faculty of Literature Department of Philosophy
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