Mitsui Mining & Smelting Co., Ltd. (Mitsui Kinzoku) is a leading Japanese metals and materials manufacturer with deep expertise in non-ferrous metal refining, functional materials, and advanced electronic components. With roots tracing back over a century, the company serves critical global supply chains spanning automotive, electronics, and industrial sectors. Its vertically integrated operations—from raw ore processing to precision material fabrication—position it as a tier-one supplier of copper foil, zinc, lead, and specialty alloys.
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