Hanyu Sawako. The Role of Reason in Scientific and Technological Age from the Perspective of Jasper' Philosophy. Karl Jaspers; Historical Actuality. 2008. 161-170
ヤスパース哲学における理性. 理想. 2003. 671. 17-26
Hanyu Sawako. Existenz Philosohpie in this Informational Age,. Karl Jaspers' Philosophy: Rooted in the Present, Paradigm for the Future. 2003. 265-270
Jaspers and Cross-Culutural Philosophy. Jahrbuch der Oesterreichischen Karl Jaspers Gesellschaft. 2001. 14. 71-80
Hanyu Sawako. The Concept of the 'Encompassing' in World Philosophy. Karl Jaspers. 1998. 45-50
Hanyu Sawako. 'Existenz' and 'Kommunikation' in Educational Philosophy of Karl Jaspers. Yearbook of the Austrian Karl Jaspers Society. 1995. 7. 8/. 61-70