1. Institute of Multidisciplinary Research for Advanced Materials, Tohoku University
2. Department of Material Science, Graduate School of Engineering, Tohoku University, now Nippon Yakin Kogyo Co., Ltd.
3. Department of Material Science, Graduate School of Engineering, Tohoku University, now Diamet Corporation
4. Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, now Toyota Physical and Chemical Research Institute