Highlights

• Japan's JOGMEC is developing dysprosium and terbium mines in Namibia to eliminate dependence on China by 2028, targeting critical heavy rare earths for EV motors and high-performance magnets.
• Mining ore isn't the bottleneck—separation is. China controls the majority of the industrial-scale solvent extraction capacity needed to process heavy rare earths into usable purity.
• Achieving true supply chain independence requires both reserves and refining infrastructure; without downstream processing capacity outside China, concentrate still flows through Chinese facilities.

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Japan purportedly has a plan to develop dysprosium and terbium mines in Namibia to reduce dependence on China. Here, Rare Earth Exchanges™ assesses what is technically credible, where the reporting leans on assumptions, and what this move actually means for the global heavy rare earth supply chain. For investors and policymakers, this is less about headlines and more about metallurgy, processing, and geopolitical timing.

A Straightforward Story—With Complex Implications

Japan is advancing plans, via Japan Organization for Metals and Energy Security (JOGMEC), to develop dysprosium and terbium resources in Namibia, according to an entry in The Asahi Shimbun (opens in a new tab).   The goal: reduce reliance on China, which dominates heavy rare earth separation and has tightened export controls amid tensions over Taiwan policy under Prime Minister Sanae Takaichi.

In a nutshell, Japan wants an alternative supply of the heavy rare earths that keep EV motors stable at high temperatures. It aims to eliminate dependence on China by 2028.

Ambitious? Yes. Simple? No.

The Metallurgical Reality Check

The article correctly notes that dysprosium and terbium are scarce and critical for high-performance magnets. It is also accurate that China dominates heavy rare earth processing and has expanded export controls.

But here is the nuance:

Mining ore is not the bottleneck. Separation is.

Heavy rare earths like dysprosium and terbium require complex, multi-stage solvent extraction to achieve usable purity. Industrial-scale cascading solvent extraction remains the only proven commercial method globally. China controls the overwhelming majority of that capability.

If Namibia provides concentrate, the key question is:

Where will it be separated? Without downstream processing—either in Africa, Japan, or allied countries—the supply chain still flows through China.

Where the Narrative Leans Forward

The suggestion that African projects, combined with Australian and French investments, will fully meet Japan’s demand by 2028 assumes:

• On-time mine development
• Permitting without delay
• Capital availability
• Refining capacity buildout
• No price undercutting from China

That is a best-case scenario.

Environmental challenges and radioactive waste management are mentioned appropriately. Those factors materially affect cost and timelines.

What This Means for the Supply Chain

This is geopolitically significant. Japan is not signaling—it is positioning.

If JOGMEC moves from reserve confirmation to operational separation capacity, this could reshape heavy rare earth leverage in Asia. If not, the headline outpaces the infrastructure.

For investors, the lesson is clear:

Reserves are geology.

Supply chains are chemistry.

Independence requires both.