1985-1986 Japan Society for the Promotion of Sciense, Fellow 1986 Fukuoka Women's College, Temporary lecturer 1988-1989 Japan Society for the Promotion of Sciense, Superior Fellow 1988-1989 Kyushu Teikyo College, Temporary Lecturer 1989-1992 Kumamoto University, Lecturer 1990-1991 Fukuoka University, Temporary Lecturer 1992-2000 kumamoto University, Associate-Professor 1993-1996 Kumamoto College, Temporary Lecturer 1994 Kagoshima Unoiversity, Temporary Lecturer 1996-1997 Kumamoto Prefectural University, Temporary Lecturer 1997-1998 Kyushu University, Temporary Lecturer 2000 Osaka University, Temporary Lecturer