Santo, Atsushi, Sustainable Consumption and Production (SCP) Group, Institute for Global Environmental Strategies (IGES), 2108-11 Kamiyamaguchi, Hayama, Kanagawa 240-0115, Japan DOWA ECO-SYSTEM Co., LTD, 14-1, Sotokanda 4 Chome, Chiyoda-ku, Tokyo 101-0021, Japan, Japan