- 2022/04 - 現在 東京農工大学 客員教授
- 2022/04 - 現在 The National Center for University Entrance Examinations
- 2012/04 - 現在 The National Center for University Entrance Examinations Research and Development Department of Test Analysis and Evaluation
- 2012/05 - 2016/03 Tokyo Institute of Technology
- 1998 - 2012/03 The National Center for University Entrance Examinations Research and Development
- 2000 - 2001 カーネギーメロン大学 言語技術研究所 客員研究員(文部省長期在外研究員)
- 2000 - 2001 Visiting Scholar, Language Technologies Institute, Carnegie Mellon University
- 1998 - : Associate Professor, National Center for University Entrance Examinations
- 1993 - 1997 : Chief Engineer, Software Research Center, Ricoh. Co., Ltd
- 1985 - 1997 (株)リコーソフトウェア研究所 研究員、主任研究員、係長研究員
- 1991 - 1992 : Associate Chief Engineer, Software Research Center, Ricoh Co., Ltd.
- 1985 - 1990 : Engineer, Software Research Center, Ricoh Co., Ltd.
- Current: Professor, National Center for University Entrance Examinations