Copper and Copper Alloy Business

Supporting the Industrial Infrastructure and Affluent Life with Our Exclusive Technologies

We process copper that we smelt into products of various shapes, such as terminal materials for automobiles, copper tubes for air conditioners, and semiconductor lead frames.
We will continue to contribute to the development of industrial and social infrastructure around the world by developing and supplying new products with high quality and performance based on our proprietary technologies.

Business Summary

Copper BilletCopper Billet

In the copper processing sector, we produce wrought copper products such as terminal connector materials for automobiles, electrical wires and copper tubes. We also apply our advanced technological capabilities to produce oxygen-free copper, oxygen-free copper alloys and other special copper alloys, which we supply globally.
In the precious metals department, we offer an accumlation plan called "My Gold Partner" for gold, silver and platinum, providing an alternative for private investors' asset building.

Targets and Strategy

Contour StripContour Strip

To become the world's most profitable company in the copper processing sector, we are expanding sales in emerging markets of MNEX, a new copper alloy. By also setting up a slitter business and sales facilities in emerging markets, we are cultivating the market for our unique alloys.


Osaka Smelter (1960s)Osaka Smelter (1960s)

Sakai PlantSakai Plant

Our Metals Business got its start in 1873, when Mitsubishi founder Yataro Iwasaki acquired and began operations at the Yoshioka Mine in Okayama Prefecture. In 1887, we also acquired a mine in Osarizawa. Full-fledged smelting and refining operations commenced in 1896, when we acquired the Ikuno and Sado mines and a refinery in Osaka from the Japanese government.

1873 Acquired and began operations at the Yoshioka Mine
1887 Acquired and began operations at the Osarizawa Mine
1896 Acquired the Ikuno Mine, the Sado Mine and a refinery in Osaka from the government
1917 Established the Naoshima Smelter & Refinery
1934 Acquired the Hosokura Mine (current Hosokura Metal Mining Company)
1958 Established the Akita Smelter & Refinery
1963 Established Onahama Smelting and Refining Co., Ltd.
1970 Established Ote Metals Co., Ltd. (current Materials Eco-Refining Co., Ltd.)
1990 Closed the Osaka Smelter & Refinery, established the Sakai Plant
1992 Established Sambo Metals Corporation
1996 Established PT. Smelting in Indonesia
2004 Established Kobelco & Materials Copper Tube, Ltd.
2008 Converted Mitsubishi Shindoh Co., Ltd., to a consolidated subsidiary
2010 Converted Mitsubishi Cable Industries Co., Ltd., to a consolidated subsidiary
2017 Acquired the Special Products Division of the Luvata Group, which specializes in processed copper products.
2020 Merger with Mitsubishi Shindoh Co., Ltd. Wakamatsu Plant and Sambo Plant were inaugurated.



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