Tsubasa Ugo, Sapporo, Hokkaido, Japan, Kazuya Ishitsuka, Hokkaido University, Division of Sutainable Resources Engineering, Sapporo, Japan; Kyoto University, Department of Urban Management, Kyoto, Japan, Yosuke Kobayashi, Muroran Institute of Technology, Muroran, Japan, Toru Mogi, Hokkaido Univ, Sapporo, Japan and Koichi Suzuki, Hokkaido University, Sapporo, Japan