| Name | Address | Phone |
| [Iron and steel producers] | ||
| Chuo Denki Kogyo Co., Ltd. | 1-1-12, Toranomon, Minato-ku, Tokyo 105-0001 | 03-3591-1401 |
| Hitachi Metals, Ltd. | 1-2-1, Shibaura, Minato-ku, Tokyo 105-8614 | 03-5765-4000 |
| Japan Metals & Chemicals Co., Ltd. | 1-17-25, Shinkawa, Chuo-ku, Tokyo 104-8257 | 03-3523-7201 |
| JFE Material Co., Ltd. | 2-9-38, Shosei-machi, Imizu-shi, Toyama-ken 934-8550 | 0766-84-4490 |
| Nachi-Fujikoshi Corp. | 1-1-1, Fujikoshihonmachi, Toyama-shi, Toyama-ken 930-8511 | 076-423-5111 |
| Nippon Denko Co., Ltd. | 1-13-14, Tsukiji, Chuo-ku, Tokyo 104-8112 | 03-3546-9330 |
| Nippon Kinzoku Co., Ltd. | 5-30-7, Shiba, Minato-ku, Tokyo 108-0014 | 03-5765-8100 |
| Nippon Koshuha Steel Co., Ltd. | 1-10-5, Iwamotocho, Chiyoda-ku, Tokyo 101-0032 | 03-5687-6023 |
| Nippon Metal Industry Co., Ltd. | 2-1-1, Nishishinjuku, Shinjuku-ku, Tokyo 163-0470 | 03-3345-5555 |
| Nippon Steel & Sumikin Stainless Steel Corporation | 2-6-1, Otemachi, Chiyoda-ku, Tokyo 100-0004 | 03-3276-4800 |
| Nippon Yakin Kogyo Co., Ltd. | 1-5-8, Kyobashi, Chuo-ku, Tokyo 104-8365 | 03-3272-1511 |
| Pacific Metals Co., Ltd. | 5-2, Toyamashinden, Kawaragi, Hachinohe-shi, Aomori-ken 031-8617 | 0178-47-7121 |
| Tohoku Steel Co., Ltd. | 23, Nishigaoka, Murata-machi, Shibata-gun, Miyagi-ken 989-1393 | 0224-82-1010 |
| [Associations] | ||
| Non-Integrated Steel Producers' Association | 3-2-10, Nihonbashi-Kayabacho, Chuo-ku, Tokyo 103-0025 | 03-5640-1122 |
| Steel Castings and Forgings Association of Japan | 1-14-4, Uchikanda, Chiyoda-ku, Tokyo 101-0047 | 03-5283-1611 |
