Toyota Supplier DENSO Wants Fewer Rare Earths. That Should Worry the Entire Supply Chain

Highlights

• DENSO, a key Toyota supplier, is investing in technologies to reduce rare earth intensity in EV motors amid China's tightening export controls on heavy rare earths.
• China controls roughly 90% of rare earth processing and magnet manufacturing, turning supply chain dependence into a strategic industrial vulnerability for global automakers.
• Alternative motor technologies like induction and switched reluctance designs involve performance tradeoffs, meaning NdFeB magnets still dominate high-performance EV drivetrains.
• Efforts to reduce rare earth vulnerability may paradoxically accelerate investment in Western rare earth supply chains as the fastest path to resilience outside China.

Japanese auto giant DENSO Corporation (opens in a new tab), a key Toyota supplier and one of the world’s largest automotive component manufacturers, is accelerating R&D aimed at reducing dependence on rare earth elements in electric vehicle motors and related systems. The move reflects mounting concern across the global automotive sector that China’s tightening grip on magnet supply chains has evolved from a procurement issue into a strategic industrial vulnerability. For rare earth investors, the signal is complex: long-term magnet demand remains enormous, but automakers increasingly want technological optionality. Can it be that there is now not only a race to secure rare earths but, in parallel, one to escape dependence on them as well?

The Auto Industry’s Rare Earth Anxiety Is Escalating

According to Nikkei Asia (opens in a new tab), DENSO plans additional investment into technologies designed to reduce rare earth dependence across motors and automotive systems. This is not occurring in isolation.

REEx has tracked a growing trend among automakers and Tier 1 suppliers seeking to reduce dysprosium, terbium, and even NdPr intensity in motor architectures. Tesla (opens in a new tab) previously shifted portions of its lineup toward induction motor designs, while multiple Japanese manufacturers have explored ferrite-assisted systems, switched reluctance motors, and reduced-heavy-rare-earth magnet chemistries.

The motivation is straightforward: China still dominates approximately 90% of rare earth processing and magnet manufacturing capacity. Reuters (opens in a new tab) recently reported that China’s tightening export restrictions on heavy rare earths have reignited supply chain anxiety in Japan and across industrial Asia. That reality is sending shockwaves through automotive procurement and engineering teams.

This Is Not the Death of Rare Earth Magnets

Investors should avoid simplistic conclusions.

Reducing rare earth intensity is not equivalent to eliminating rare earth magnets altogether. High-performance NdFeB magnets still dominate EV drivetrains because of their unmatched power density, efficiency, compactness, and thermal performance.

Physics still matters.

Alternative motor technologies often involve tradeoffs in weight, efficiency, cooling demands, system size, or manufacturing complexity. In aerospace, robotics, drones, advanced semiconductors, and defense systems, many of those compromises remain commercially or operationally unacceptable.

That is why, despite redesign efforts, long-term NdPr demand forecasts remain structurally bullish.

China Has Already Changed Corporate Behavior

The deeper story is strategic psychology. China’s export controls and geopolitical leverage are now reshaping engineering priorities inside some of the world’s largest industrial companies. Automakers no longer assume rare earth availability is guaranteed.

That shift could accelerate:

• motor redesigns,
• magnet recycling,
• ferrite motor deployment,
• reduced-heavy-rare-earth formulations,
• and regional magnet manufacturing outside China.

But here is the irony few investors fully appreciate: efforts to reduce rare earth vulnerability may ultimately accelerate investment into Western rare earth supply chains. Because the fastest path to resilience may not be abandoning magnets.

It may be building them outside China.