1. Chairman of Iron a nd Steel Analysis Committee, Joint Research Society, ISIJ
2. Chairman of Chemical Analysis Subcomm., Iron and Steel Analysis Comm., Joint Research Society, lSIJ
3. Chairman of Photoelectric Emiss ion Spectroscopic Analysis Subcomm., Iron and Steel Analysis Comm., Joint Research Society, lSIJ
4. Chairman of Fluorescent X-ray Analysis Subcomm., Iron and Steel Analysis Comm., Joint Research Society, lSIJ
5. Chairman of Nonmetallic Inclusions Analysis Subcomm., Iron and Steel Analysis Comm., Joint Research Society, lSIJ