1. Hitachi, Ltd., Hitachi Works, 3-1 Saiwai-cho Hitachi, Japan (0294) 21-1111
2. Hitachi, Ltd., Hitachi Research Lab., 4026, Kuji-cho Hitachi, Japan (0294) 52-5111
3. Hitachi, Ltd., Mechanical Engineering Research Lab., 502, Kandatsu-cho Tsuchiura, Japan (0298) 31-5111
4. Kyoto Univ., Plasma Physics Lab., Gokasho Uji, Kyoto, Japan (0774) 32-3111