Specialized members
| Name | Address | Phone |
| [Iron and steel producers] | ||
| Chubu Steel Plate Co., Ltd. | 5-1, Kousudori, Nakagawa-ku, Nagoya-shi, Aichi-ken 454-8506 | 052-661-3811 |
| Japan Metals & Chemicals Co., Ltd. | 2-12-10, Nihonbashi-Kayabacho, Chuo-ku, Tokyo 103-0025 | 03-6704-4720 |
| Nippon Denko Co., Ltd. | 1-4-16, Yaesu, Chuo-ku, Tokyo 103-8282 | 03-6860-6800 |
| NIPPON KINZOKU CO., LTD. | 5-30-7, Shiba, Minato-ku, Tokyo 108-0014 | 03-5765-8111 |
| Nippon Koshuha Steel Co., Ltd. | 1-10-5, Iwamotocho, Chiyoda-ku, Tokyo 101-0032 | 03-5687-6023 |
| NIPPON STEEL Stainless Steel Corporation | 1-8-2, Marunouchi, Chiyoda-ku, Tokyo 100-0005 | 03-6841-4800 |
| Nippon Yakin Kogyo Co., Ltd. | 1-5-8, Kyobashi, Chuo-ku, Tokyo 104-8365 | 03-3272-1511 |
| PACIFIC METALS CO., LTD. | 5-2, Toyama-shinden, Kawaragi, Hachinohe-shi, Aomori-ken 031-8617 | 0178-47-7121 |
| Proterial, Ltd. | 5-6-36 Toyosu, Koto-ku, Tokyo 135-0061 | 0120-603-303 |
| 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 |
