1. Materials & Processing Research Center, NKK Corp., now Graduate School of Engineering, Tohoku University
2. Materials & Processing Research Center, now Fukuyama Works, NKK Corp.
3. Materials & Processing Research Center, NKK Corp., now NEDO
4. Materials & Processing Research Center, NKK Corp., now Institute for Advanced Materials & Processing, Tohoku University
5. Materials & Processing Research Center, NKK Corp.