1. Department of Materials and Applied Chemistry College of Science and Technology Nihon University 1-8-14, Kanda Surugadai Chiyoda-ku Tokyo 101-8308
2. National Institute of Technology Miyakonojo College 473-1, Yoshio Miyakonojo Miyazaki 885-8567
3. Takachiho Shirasu Co. Nakakirishima 1719 Yamada Miyakonojo Miyazaki 889-4602