OBINATA Sumio
Doctor of letters
Faculty of Letters, Arts and Sciences Professor
| 1983-1985 | Tokyo Metropolitan Junior College of Commerce, Instructor |
| 1986-1990 | Tokyo Metropolitan Junior College of Commerce, Assistant Professor |
| 1991-1995 | Tokyo Metropolitan Junior College of Commerce, Professor |
| 1996-1998 | Tokyo Metropolitan College, Professor |
| 1999‐ | Waseda University, Professor |
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