- 2009/04 - 現在 Oita University School of Medicine, Faculty of Medicine
- 2009/04 - 2012/03 Beppu University Graduate School of Literature
- 2007/04 - 2009/03 National Graduate Institute for Policy Studies
- 2001/04 - 2009/03 National Institute for Japanese Language and Linguistics Senior Researcher
- 1994/04 - 2009/03 Takushoku University Language and Culture Research Institute
- 2007/09 - 2008/03 Tohoku University Graduate School of International Cultural Studies
- 2004/09 - 2005/03 Ochanomizu University
- 2002/04 - 2005/03 Ochanomizu University
- 2001/04 - 2002/03 Shinshu University Faculty of Arts
- 1997/04 - 2001/03 National Institute for Japanese Language and Linguistics
- 1997 - 2001 The National Language Research Institute, Research Director
- 2001 - - The National Institute for Japanese Language, Senior Researcher
- 1994/04 - 1998/03 Kumamoto Gakuen University Faculty of Foreign Languages
- 1994/04 - 1997/03 National Institute for Japanese Language and Linguistics
- 1994 - 1997 The National Language Research Institute, Research Head
- 1992/04 - 1994/03 Kumamoto University Faculty of Education
- 1989/04 - 1994/03 Kumamoto University
- 1987/04 - 1994/03 熊本短期大学 助教授
- 1987 - 1994 Kumamoto Junior College, Assistant Professor
- 1972/04 - 1987/03 熊本県立高等学校 熊本高校など4校 教諭
- 1972 - 1987 Kumamoto Prefectural High School, Teacher
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THE SOCIETY FOR TEACHING JAPANESE AS A FOREIGN LANGUAGE
, 日本言語政策学会
, 日本プライマリ・ケア学会
, 日本医学教育学会
, 社会言語科学会
, 日本語学会
, The Linguistic Society of Japan
, The Phonetic Society of Japan
, The Behaviormetric Society of Japan
, The Mathematical Linguistic Society of Japan.
, The Japanese Association of Sociolinguistic Sciences.
, The Society of Japanese Linguistics.