- - 2008 University of Edinburgh The School of Phylosophy,Psychology, and Language Science Linguistics
- - 2004 University of Durham The Department of English Language and Linguistics Language Acquisition
- - 1996 Tokyo Gakugei University Faculty of Education
- - 1996 Tokyo Gakugei University Faculty of Education Education for children with language/speech disorders
- - 1996 The University of Durham Graduate School, Division of Literature and Linguistics Language Acquisition
- - 1996 The University of Edinburgh Graduate School, Division of Linguistic Sciences Theoretical and Developmental Linguistics
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