| Daido Steel Co., Ltd. http://www.daido.co.jp/ |
| Proterial., Ltd. https://www.proterial.com/ |
| Nippon Koshuha Steel Co., Ltd. |
| Aichi Steel Corporation http://www.aichi-steel.co.jp/ |
| Nippon Yakin Kogyo Co., Ltd. http://www.nyk.co.jp/ |
| Marubeni Tetsugen Co., Ltd. |
| NIPPON STEEL CORPORATION https://www.nipponsteel.com/ |
