| Ahresty Corporation |
Nippon Light Metal Co., Ltd. |
| Asahi Kinzoku Kogyo Co., Ltd. |
Nippon Mining & Metals Co., Ltd. |
| Benkan Corporation |
Nippon Steel Welding Products & Engineering Co. |
| Chuo Spring Co., Ltd. |
Nishi Nippon Electric Wire & Cable Co., Ltd. |
| Daiki Aluminium Industry Co., Ltd. |
Nuclear Fuel Industries, Ltd. |
| Dowa Ironpowder Co., Ltd. |
Occ Corporation |
| Dowa Mining Co., Ltd. |
Piolax, Inc. |
| Fujikura Ltd. |
Ryobi Ltd. |
| Furukawa Electric Co., Ltd. |
Sanwa Shutter Corporation |
| Gifu Seiki Kogyo K. K. |
Se Corporation |
| Hitachi Powdered Metal |
Shibazakj Seisakusho, Ltd. |
| Horie Metal Co.,Ltd. |
Shin-Etsu Handotai Co., Ltd. |
| Japan Crown Cork Co., Ltd. |
Showa Aluminum Corporation |
| Japan Nuclear Fuel Limited |
Showa Electric Wire & Cable |
| Jone Crane Japan, Inc. |
Sumitomo Electric Industries |
| Kanematsu Metals Ltd. |
Sumitomo Light Metal Industries, Ltd. |
| Kdk Corporation |
Sumjtomo Metal Mining Co. |
| Kikuchi Co., Ltd. |
Sumitomo Sitix Corporation |
| Kobe Steel, Ltd. |
Suncall Corporation |
| Komatsu Electronics Metals |
Suzukj Metal Industry Co., Ltd. |
| Marubeni Metal Corporation |
Tanaka Kjkinzoku Kougyo |
| Meira Corporation |
Toho Titanium Co., Ltd. |
| Mitsubishi Cable Industries, Ltd. |
Tokusen Kogyo Co., Ltd. |
| Mitsubishi Materials Corp. |
Tokyo Tungsten Co., Ltd. |
| Mitsubishi Materials Silicon Corporation |
Tostem Corporation |
| Mitsubishi Shindoh Co., Ltd. |
Totoku Electric Co., Ltd. |
| Mitsui Aluminium Company, Ltd. |
Toyama Light Metal Industry Company, Ltd. |
| Mitsui Mining & Smelting Co. |
Toyo Aluminium K.K. |
| Nakashima Propeller Co., Ltd. |
Toyo Seikan Kaisha，Ltd. |
| Nasu Denkj-Tekko Co., Ltd. |
Tyton Company Of Japan, Limited |
| NHK Spring Co., Ltd. |
Yokohama Hydex Co |
