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Mitsubishi Materials Corporation (TSE: 5711) is a diversified Japanese metals group spanning both ends of several critical-mineral supply chains at once: upstream copper/precious-metals smelting and refining (Naoshima and Onahama smelters, using the proprietary "Mitsubishi Process"), e-scrap/urban-mining recycling of gold, silver, copper and PGMs, and downstream advanced-materials manufacturing — cemented-carbide cutting tools and tungsten products (via its wholly owned former H.C.
Named counterparties identified by open-source research and written only where a primary source states the relationship — never inferred from sector or co-mention. 3 suppliers. This is a partial view: it covers the relationships we could evidence, not the company's full supply base.
Press release: 'The Parties will enter into a long-term, win-win APT and tungsten oxide offtake agreement.' No volumes, price or duration disclosed, and the release frames the offtake as an agreement the parties will enter into rather than one shown independently executed with terms; recorded here as the only primary-source statement found of Masan supplying MMC with tungsten products. Masan (Nui Phao, Vietnam) has no dossier in this corpus.
MMC release 2024-10-28: 'The first shipment of copper concentrate from the Mantoverde Mine in Chile, in which Mitsubishi Materials Corporation (MMC) holds a 30% interest, arrived at our Naoshima Smelter & Refinery'; 'MMC has the right to offtake 30% of the copper production.' Capstone Copper (70% owner/operator) is named as 'our partner in the mine'. related_party because MMC is a 30% JV owner. No tonnage stated.
FCX FY2025 10-K: 'Sales to MMC, PTFI's joint venture partner in PT Smelting, totaled $1.7 billion in 2025, $4.4 billion in 2024 and $2.0 billion in 2023. Sales to MMC totaled 17% of FCX's consolidated revenues in 2024, and they are the only customer that accounted for 10% or more of FCX's annual consolidated revenues during the three years ended December 31, 2025.' Product is PT Freeport Indonesia (Grasberg) copper concentrate; the 10-K does not state where MMC has it processed (PT Smelting, Gresik, Indonesia, is the JV in which MMC is PTFI's partner). related_party because of the PT Smelting JV.
Scope. Absence of a counterparty here is not evidence that none exists — most commercial sourcing is confidential and never becomes public. Rows without a share figure mean no share was disclosed, not that the relationship is small.
5 other tracked dossiers name this company as a counterparty in its own sourced disclosure — this platform never wrote these rows on this company's own page, they are read here inverted from the dossier that disclosed them. This is a partial view: 982 additional named-counterparty rows across the corpus could not be matched to a tracked dossier by name at all (mostly non-Latin legal names), so the true count is higher than what renders here.
Minera Los Pelambres (Los Pelambres mine, Coquimbo, Chile; Antofagasta 60%) audited FY2024 separate IFRS statements filed with Chile's CMF (SARYT registry; image scan), Note 23 b) related-party transactions: 'Mitsubishi Materials Corporation | Ventas | 404.911' (MUS$ 2024; 287.927 in 2023), i.e. US$405m of 2024 sales. MMC's copper smelters (Naoshima, Kagawa; Onahama, Fukushima) are in Japan. MM LP Holding BV holds 15% of Pelambres (Note 21), hence related_party.
Disclosed by the buyer. MMC release 2024-10-28: 'The first shipment of copper concentrate from the Mantoverde Mine in Chile, in which Mitsubishi Materials Corporation (MMC) holds a 30％ interest, arrived at our Naoshima Smelter & Refinery'; 'MMC has the right to offtake 30％ of the copper production.' Capstone Copper (70% owner/operator) is named as 'our partner in the mine'. related_party because MMC is a 30% JV owner of Mantoverde. No tonnage stated.
FCX FY2025 10-K: 'Sales to MMC, PTFI's joint venture partner in PT Smelting, totaled $1.7 billion in 2025, $4.4 billion in 2024 and $2.0 billion in 2023. Sales to MMC totaled 17% of FCX's consolidated revenues in 2024, and they are the only customer that accounted for 10% or more of FCX's annual consolidated revenues during the three years ended December 31, 2025.' Product is PT Freeport Indonesia (Grasberg) copper concentrate; the 10-K does not state where MMC has it processed (PT Smelting, Gresik, Indonesia, is the JV in which MMC is PTFI's partner). related_party because of the PT Smelting JV.
Prior to 2025-04-30, MMC held 25% of Copper Mountain Mine (BC) Ltd. and took 100% of its concentrate under a prior offtake (Hudbay AIF 2024, 40-F exhibit 99.1 — SEC link now 403, no live mirror found). MMC's own 2025-03-28 announcement: Hudbay to acquire MMC's 25% interest for US$44.25m; the sale completed 2025-04-30 (per Torys law-firm summary of the transaction). Post-closing, MMC retains 85% of Copper Mountain copper concentrate offtake for 15 years, Hudbay takes the remaining 15%, rising to 100% Hudbay after year 15 — so related_party no longer applies. Origin = Copper Mountain Mine, BC (CA); destination = MMC's copper smelters, Naoshima and Onahama, Japan.
Compañía Contractual Minera Candelaria (Candelaria complex, Copiapó, Atacama, Chile; Lundin 80%) audited FY2025 IFRS statements filed with Chile's CMF (SARYT royalty registry), Note 12 related-party transactions: 'Mitsubishi Materials Corporation | Common Shareholder | Sales of copper concentrates | 75,744 | 57,479' (ThUS$ 2025 | 2024), i.e. US$75.7m in 2025. MMC's copper smelters (Naoshima; Onahama) are in Japan.
Scope. This section is inverted evidence: each linked dossier wrote the original row about itself, describing its own relationship to this company. It is never a claim this company itself disclosed. Absence here is not evidence of no relationship — most of the corpus has no named-counterparty block at all yet.
This company sits on the supply side for 6 of its 6 materials — a restriction on those is a tailwind, not a headwind.
As a producer, policy pressure across its produced materials is rising.
Descriptive trend in official policy actions on this company’s materials — a policy-pressure trend, not a price or trading signal. No forward probability is implied. Direction is measured on actions we have discovered, and discovery lags events: where the recent window is too thin to support a calm reading, the row says coverage-limited instead of easing.
🇨🇳 CN accounts for 100% of severity-weighted pressure.