Graduate School of Landscape Design and Management, Landscape Planning and Horticulture Academy, University of Hyogo/Awaji, 654-2 Nojimatokiwa, Awaji-city, Hyogo 656-1726, Japan
Keitarou Hara
Tokyo University of Information Sciences, 1200-2 Yatoh-cho, Wakaba-ku, Chiba 260-8501, Japan