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Mitsubishi Materials

Mitsubishi Materials is a Japanese diversified materials and metals company operating in copper smelting, cement, advanced materials and electronic components. It is headquartered in Tokyo and forms part of the broader Mitsubishi group of companies. The company is listed on the Tokyo Stock Exchange and operates across Japan, Asia and other international markets. Its core businesses include copper and other metal smelting and refining, production of cemented carbide tools, and manufacture of electronic materials and components. In the copper sector, Mitsubishi Materials holds interests in overseas smelting ventures, including a stake in PT Smelting, a copper smelter in Gresik, Indonesia, which processes concentrate supplied by Freeport Indonesia from the Grasberg mine. Through such joint ventures, the company secures downstream processing capacity for copper concentrate and participates in the value chain linking mining output to refined metal production. It generates substantial annual revenue across its diversified segments and employs a large global workforce. The company traces its origins to Mitsubishi's historic mining and metals operations, later reorganised into its present form as part of Japan's postwar industrial restructuring, and has since expanded into advanced materials to complement its traditional metals business.

Mitsubishi Materials News


Tungsten
Japan's Mitsubishi Materials to expand tungsten recycling capacity at Akita
9th September 2026 By: Reuters

Mitsubishi Materials said on Wednesday it would invest about 8-billion yen ($52-million) to expand tungsten recycling capacity at its subsidiary Japan New Metals, as Japan seeks supplies of the... 


Freeport Indonesia's Smelting Gresik operation
Freeport Indonesia's unit Smelting Gresik halts operations for furnace repairs
12th August 2026 By: Reuters

Freeport Indonesia said on Wednesday that smelter operations at its Smelting Gresik subsidiary have been stopped since August 8 for furnace repairs. Freeport Indonesia CEO Tony Wenas said in a... 


Capstone to resume full production at Chile's Mantoverde mine as strike ends
6th February 2026 By: Reuters

Canada's Capstone Copper said on Friday that the largest union at its Mantoverde copper‑gold mine in Chile had approved a new three‑year labour contract, ending a strike that started on January 2... 


Capstone Copper restarts Chile's Mantoverde mine while strike continues
2nd February 2026 By: Reuters

Capstone Copper resumed operations at its Mantoverde copper and gold mine in northern Chile, even as a strike by a labor union representing nearly 22% of its workforce continued, the Canadian miner... 


Union at Chile's Mantoverde mine says company avoiding talks to end strike
26th January 2026 By: Reuters

The union at Capstone Copper's Mantoverde copper and gold mine in northern Chile on Saturday denied a company claim that it was still occupying a desalination plant at the facility, saying the... 


Striking workers force production halt at Chile's Mantoverde mine
23rd January 2026 By: Reuters

roduction at Capstone Copper's Mantoverde copper and gold mine in northern Chile is largely halted after the mine's desalination plant was shut down amid a nearly three-week labor strike, the... 


Capstone Copper's Chile operations
Strike continues at Capstone Copper's Mantoverde mine after negotiations fail
8th January 2026 By: Reuters

A workers' strike at Capstone Copper's Mantoverde mine in northern Chile will continue after negotiations between the company and the union failed, the union said on Wednesday. The union in a... 


Freeport Indonesia to wrap up Gresik plant repairs by early September
27th August 2025 By: Reuters

Copper miner PT Freeport Indonesia expects to complete in early September repair work at its joint-venture smelter in East Java, a company spokesperson said on Wednesday. Repairs at an oxygen... 


Image of heavy mining trucks
Mantoverde optimised project, Chile
22nd August 2025 By: Sheila Barradas

The project aims to increase throughput from 32 000 t/d to 45 000 t/d of ore. 


Capstone Copper greenlights Mantoverde expansion in Chile
Capstone Copper greenlights Mantoverde expansion in Chile
11th August 2025 By: Mariaan Webb

TSX- and ASX-listed Capstone Copper has sanctioned construction of its Mantoverde Optimised (MV-O) project in Chile, following receipt of all required board and regulatory approvals, including the... 


Capstone Copper hits revenue record in Q2
1st August 2025 By: Mariaan Webb

TSX- and ASX-listed Capstone Copper reported its highest-ever quarterly revenue and adjusted earnings before interest, tax, depreciation and amortisation (Ebitda), buoyed by strong sulphide copper... 


Japan copper smelters face tough talks with global miners over processing fee
Japan copper smelters face tough talks with global miners over processing fee
24th July 2025 By: Reuters

Japanese copper smelters face tough mid-year negotiations with global miners over treatment and processing charges (TC/RCs) as they wouldn't be able to accept the very low terms that Chinese... 


Hudbay takes full ownership of Copper Mountain mine
2nd May 2025 By: Creamer Media Reporter

TSX- and NYSE-listed Hudbay Minerals has completed its acquisition of Mitsubishi Materials Corporation’s (MMC's) 25% stake in the Copper Mountain mine in British Columbia, giving it full ownership... 


Hudbay’s expands copper production with Copper Mountain buy
Hudbay’s expands copper production with Copper Mountain buy
31st March 2025 By: Mariaan Webb

TSX- and NYSE-listed Hudbay Minerals has secured a $44.25-million deal to acquire Mitsubishi Materials Corporation's (MMC's) 25% stake in the Copper Mountain mine in British Columbia, consolidating... 


Rio Tinto backs US recycling project as tariffs upend scrap flow
14th March 2025 By: Bloomberg

Rio Tinto Group is investing in Exurban, a company planning to build an Indiana plant to recover metals from mobile phones, computers and other electronic waste, just as the Trump administration’s... 


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pqt: 0.059s - ct: 0.107s - 235pq - 2rq
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