On the English Phoneme "t" : From the Viewpoint of Japanese Speakers. Research Bulletin of Tokushima Bunri University. 2000. 59. 83-96
About Problematic Examinations on English Pronunciation in Written Tests : The Underlying Elements Causing such Problems. Research Bulletin of Tokushima Bunri University. 1999. 57. 27-42
The Interfering Nature of Japanese Katakana-style Loanwords from English when Listening to Spoken English, and such Helpful Katakana-style Loanwords as-haNdzщre/, /tsщreJN/, /sщtщRwщdesщ/, and/KoNs RmaR. Journal of Science and Humanities of SHIN-AI Women's Jr. College. 1998. 38. 35-43