1. Mineral Resources Research Group, Institute for Geo-Resources and Environment, Geological Survey of Japan, National Institute of Advanced Industrial Science and Technology
2. Department of Resources and Environmental Engineering, Faculty of Science and Engineering, Waseda University
3. Miike Smelting Co., Ltd
4. Copper Business Strategic Division, Mitsui Mining & Smelting Co., Ltd
5. Metals & Recycling Division, Metals Sector, Mitsui Mining & Smelting Co., Ltd