1. Graduate School of Integrated Arts and Sciences, Hiroshima University, Higashi-Hiroshima, Japan
2. Graduate School of Education, Hiroshima University, Higashi-Hiroshima, Japan
3. Faculty of Health and Sports Sciences, Hiroshima International University, Higashi-Hiroshima, Japan
4. Centre of Liberal Arts Education, Ryotokuji University, Urayasu, Japan