- 2013 - 2016 On the Reliability and Validity of the Use of Corpus Data as Evidence for I-Language Studies
- 2010 - 2012 On the Objectivity and Reliability of Corpus Data for Linguistic Research
- 2010 - 2012 Development and spread of Korean CALL materials creation techniques
- 2009 - 2011 A Corpus-Based Study of Present-Day English Constructions and a Methodological Study for Using Corpora
- 2006 - 2008 The Application of Linguistic Theories and Information Processing Techniques to the Design of English Corpus Search Systems for EFL Learners
- 2005 - 2007 A Descriptive and Theoretical Study of Constructions in English and their Coroocurrences A Corpus-Based Approach
- 2004 - 2006 自然言語処理技術を応用した英語学習者の誤用に関する包括的かつ体系的分析
- 2001 - 2003 Developing a database of native speaker sample sentences for EFL learners providing an appropriateness judgment service for user-provided sentences.
- 2001 - 2003 A Lexico-Grammatical Investigation of Contemporary English : A Corpus-Based Approach
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