JX Metals: The Little-Known Company Behind 60% of the Metal in Advanced Chips

In why most chip materials are made in Japan, we looked at the Japanese companies behind photoresists and silicon wafers. One layer deeper sits a company that controls the metal from which the circuits themselves are formed: JX Metals. For the industry's overall division of labor, see how the semiconductor value chain works (in Japanese).

What kind of company is JX Advanced Metals?

JX Advanced Metals (JX Metals) is a Japanese non-ferrous metals maker spanning semiconductor materials, ICT materials, and metal smelting and recycling. Its origins date to the 1905 opening of the Hitachi Mine in Ibaraki Prefecture, and it has long run an integrated business — from ore mining through refining and processing — centered on copper. After years as a wholly owned subsidiary of the ENEOS group, it listed on the Tokyo Stock Exchange Prime market on March 19, 2025 (Nikkei).

The business rests on three pillars: semiconductor materials; ICT materials (rolled copper foil, titanium and more); and metals and recycling (copper smelting and resource development). In FY2024, company-wide operating profit was about 112.5 billion yen, of which semiconductor materials contributed about 26.7 billion yen. It is not a flashy brand — but it is a materials company embedded in virtually every advanced chip (JX Advanced Metals Corporation).

Where do sputtering targets matter in a chip?

A sputtering target is a block of high-purity metal that serves as the raw material when a chip's interconnects and barrier films are formed. Inside a vacuum chamber, ions bombard the target, ejecting metal atoms from its surface; those atoms settle onto the wafer as an ultra-thin film. This step is deposition — building up thin films one layer at a time.

JX Metals' targets matter chiefly around the chip's wiring. The copper interconnects that carry current, the tantalum barrier films that keep that copper from bleeding into the surrounding insulator, and the seed layer that lets the copper grow uniformly — all are formed from metal sputtered off a target. In advanced logic, copper and tantalum are used practically as a set, and JX Metals supplies both through an integrated chain from mine to finished product (JX Advanced Metals Corporation).

Products map to roles like this:

Why is JX Metals so hard to replace?

The biggest reason is purity. Advanced-chip copper interconnects demand ultra-high 6N purity (99.9999% or higher), and even trace impurities directly depress yield — the share of good chips. A contaminant in the wiring disturbs electrical resistance and can ruin the entire chip. Very few companies in the world can deliver this purity consistently.

The other moat is integrated supply. JX Metals can connect its own chain for both copper and tantalum — from mining through refining and processing — engineering raw-material quality from the very top of the stream. And unlike equipment, a target is a consumable: it erodes away with every deposition run. That makes stable supply and trust decisive, and once a target is designed in, customers rarely switch.

Where does JX Metals stand in the market?

JX Metals holds roughly 60% of the global market for semiconductor sputtering targets. In targets for the advanced logic and high-bandwidth memory (HBM) used in AI servers, its share is said to be even higher. The more advanced chips the generative-AI boom drives into production, the more interconnect material the industry needs (Newswitch).

Its presence in ICT materials is just as large: in rolled copper foil — high-purity copper rolled into thin, bend-resistant sheets — its global share is estimated at about 78%. It is an essential material for the foldable circuit boards in smartphones and wearables. Anticipating this demand, JX Metals is investing about 23 billion yen in a new plant in Hitachinaka, Ibaraki, to lift target production capacity to 1.6 times FY2023 levels, with phased start-up from the second half of FY2027. Demand from the foundries (in Japanese) mass-producing AI chips — and from the data centers beyond them — is pulling growth all the way upstream to metal materials (Nikkei Business SPECIAL / JX Advanced Metals).

What challenges does JX Metals face?

The biggest are resources and geopolitics. The business is built on procuring copper ore, so copper and tantalum price swings, political conditions in resource countries, and export-control developments all feed into earnings and the supply chain. Rare metals like tantalum come from a small set of producing regions, making diversified sourcing and recycling essential.

On the demand side, earnings are exposed to the AI chip investment cycle. If foundry capital spending pauses, target demand can soften temporarily. Like ASML and its EUV machines (in Japanese) in lithography, upstream materials companies are never insulated from swings in end demand.

Why did JX Metals draw attention in 2025?

The trigger was independence from the ENEOS group. In March 2025 it separated from parent ENEOS and became a standalone company — and a business that is unglamorous but indispensable was suddenly made visible in the middle of the AI chip boom. It became widely recognized as one of the supply chain's hidden chokepoints.

With advanced-chip demand from AI data centers as a tailwind, the semiconductor materials segment keeps gaining weight. At the same time, the business remains exposed to resource prices for copper and tantalum and to the semiconductor cycle — it cannot escape the swings of supply and demand.

Key takeaways

• JX Advanced Metals (JX Metals) is a non-ferrous metals maker holding roughly 60% of the global market for semiconductor sputtering targets.
• Sputtering targets are blocks of high-purity metal used to deposit copper interconnects and barrier films — they directly affect advanced-chip yield.
• It also holds an estimated 78% global share in rolled copper foil, with integrated supply of copper and tantalum from mine to finished product.
• It became independent from the ENEOS group in 2025, and AI chip demand has made its role widely known.
• Key risks are resource procurement and geopolitics; diversified sourcing and recycling of copper and tantalum are critical.