Japan Tungsten Plant to Cut Sumitomo Electric’s Reliance on China

Sumitomo Electric

Japan tungsten plant investment by Sumitomo Electric Industries will expand domestic tungsten powder capacity and strengthen Japan’s critical mineral supply chain. The company plans to build a new facility in Toyama city with about ¥15.9bn, or $100mn, in investment.

The new plant will be operated by group company Allied Material and is scheduled to start operations in the first half of fiscal 2028. Sumitomo Electric said the project will expand its tungsten supply capacity by around 50%.

Japan tungsten plant development matters because tungsten is essential for cemented carbide cutting tools, semiconductors, electronic components and advanced industrial manufacturing. The investment also reflects Tokyo’s wider effort to reduce exposure to China-dominated critical material supply chains.

Tungsten Powder Capacity Supports High-End Manufacturing

The Toyama facility will expand production capacity for tungsten powder near Sumitomo Electric’s existing plant. The company has not yet disclosed the precise capacity of the new line.

Tungsten powder is a key input for cemented carbide tools used in metal cutting and precision machining. These tools support automotive, aerospace, electronics, machinery and industrial equipment production.

The material also has strategic relevance in semiconductors and electronic components. This makes tungsten more than a tooling metal; it is part of the materials base behind advanced manufacturing and technology supply chains.

Japan Backs Domestic Recycling and Supply Security

The Japanese government will cover about ¥7.5bn of the investment through a subsidy aimed at securing critical mineral supply chains. This public support shows that tungsten is now treated as a strategic industrial material.

Global tungsten supply remains heavily dependent on China. Sumitomo Electric said it currently relies on China for about 30% of its tungsten imports.

The new Japan tungsten plant will help the company strengthen its domestic recycling system and gradually reduce that dependence. Recycling will be especially important because secondary tungsten can improve supply resilience without relying only on new mined material.

The Metalnomist Commentary

Sumitomo Electric’s investment shows that tungsten security is becoming a manufacturing competitiveness issue. Japan is not only adding capacity; it is building a recycling-backed buffer for cutting tools, semiconductors and advanced components.