1. Kagoshima University 1–21–40 Korimoto Kagoshima 890‐0065 Japan
2. National Institute of Technology Kumamoto College 2659–2 Suya, Koshi Kumamoto 861‐1102 Japan
3. National Institute of Technology Hiroshima College 4272–1 Higashino, Ohsakikamishima, Toyota Hiroshima 725‐0231 Japan