A Study of Sentence-Level Grammar of Social Speech in Tanegashima Dialect-on the Bunmatsushi"Kiryā, Kirā, Keryā, Kerā" cpart-1. Research Bulletin of the Faculty of Humanities Shigakukan-University. 2002. 23. 2. 1-13
A Survey of Students' Composition Abilities-at Kagoshima Women's College (Renamed Shigakukan University in 1999). Research Bulletin of the Faculty of Humanities Shigakukan University. 2001. 22. 2. 243-269