- 1999 - 2000 九州大学大学院数理学研究科 助教授
- 1999 - 2000 Associate Professor, Graduate School of
- 2000 - - 九州大学大学院数理学研究院 助教授
- 2000 - - Associate Professor, Faculty of Mathematics
- 1997 - 1999 Hiroshima University School of Education
- 1997 - 1999 Associate Professor, Faculty of Education,
- 1995 - 1997 Hiroshima University Faculty of Science
- 1995 - 1997 Associate Professor, Faculty of Science,
- 1994 - 1995 University of Teacher Education Fukuoka Faculty of Education
- 1994 - 1995 Associate Professor, Faculty of Education,
- 1986 - 1993 University of Teacher Education Fukuoka Faculty of Education
- 1986 - 1993 Assistant Professor, Faculty of Education,
- 1984 - 1986 University of Teacher Education Fukuoka Faculty of Education
- 1984 - 1986 Research Associate, Faculty of Education,
- Kyushu University
- Mathematics Kyushu University
- Hiroshima University
- Fukuoka University of Education
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(International Federation of Nonlinear Analysts)非線形解析学者国際連合
, (Society For Industrial And Applied Mathematics)工業応用数学会
, 日本応用数理学会
, 日本数学会