Mitsui Chemicals to buy JSR for $11.6 billion with DBJ backing

Mitsui Chemicals is acquiring JSR, a company that makes materials used in semiconductor production. The purchase price is 1.84 trillion yen, or $11.61 billion. JSR is being sold by Japan Investment Corporation, a state-backed fund overseen by Japan’s finance ministry.

The financing is spread across several sources. Mitsui plans to sell up to 150 billion yen in shares and has arranged a 1.64 trillion-yen bridge loan. It will also use bank loans, issued debt and mezzanine financing. The equity sale will partly repay the bridge loan.

The Development Bank of Japan will invest 200 billion yen. This backing comes as Mitsui takes on a transaction larger than twice its own latest market value of 664.6 billion yen. Mitsui says it wants to expand its chip-materials business and gain 40 billion yen in additional annual profit through the acquisition.

This is an unusually large transaction for Japan’s chemical industry. Mitsui Chemicals agreed to pay 1.84 trillion yen, equivalent to $11.61 billion, for JSR. The deal is described as one of the largest in the sector and could reshape Japan’s chip supply chain.

The purchase is especially striking against Mitsui’s own size. Its market capitalisation was 664.6 billion yen based on the latest closing share price. That means the acquisition price is substantially larger than the company’s market value. Mitsui’s shares fell sharply as investors considered the funding burden.

The comparison with earlier deals shows the scale clearly. The transaction is more than twice Showa Denki’s $4.55-billion acquisition of Hitachi Chemical in 2020. Mitsui is therefore using extensive financing and government-backed support to pursue a major industrial consolidation.

A photoresist is a light-sensitive coating used during chip fabrication. It is applied to a semiconductor wafer and exposed through a patterned mask. The exposed areas change chemically, allowing selected parts of the coating to be removed and leaving a precise design.

That design acts as a guide for later processing. Manufacturers can etch or otherwise modify the wafer where the photoresist pattern allows. Repeating this process builds the many layers and circuit features needed for a working chip. The article specifically says photoresists transfer circuit patterns onto semiconductor wafers.

This makes photoresist quality essential. A defect or inaccurate pattern can damage a wafer or reduce chip performance. JSR makes these materials, which is why its business matters to Japan’s semiconductor-materials supply chain. Mitsui is expanding in this field and expects 40 billion yen in additional annual profit from buying JSR.

Japan’s support reflects the strategic importance of semiconductor materials. The article says the acquisition could reshape Japan’s chip supply chain as the government works to boost the country’s competitiveness. Materials such as photoresists are a crucial part of the chipmaking ecosystem.

Japan Investment Corporation bought JSR for 900 billion yen in 2024. At that time, JIC said it planned to use JSR to promote consolidation in the semiconductor-materials sector. Mitsui’s purchase continues that direction by moving JSR into a larger chemical company with an expanding chip-materials business.

The Development Bank of Japan is also providing direct financial backing. DBJ will invest 200 billion yen, helping support a transaction whose funding needs have concerned market participants. The government-linked involvement signals that strengthening the domestic supply chain is a national industrial priority, although Mitsui remains responsible for arranging most of the financing.

If the transaction works as planned, Mitsui Chemicals would combine its expanding chip-materials business with JSR’s semiconductor-materials operations. That could create a stronger Japanese supplier and support the government’s effort to improve national competitiveness. The article describes the deal as capable of reshaping Japan’s chip supply chain.

The main mechanism is consolidation and portfolio management. JSR makes photoresists, which transfer circuit patterns onto semiconductor wafers. Mitsui plans to sell JSR’s life-sciences unit and other non-core businesses, focusing resources on activities it believes can create more value. It also targets 40 billion yen in additional annual profit.

The outcome is not guaranteed. Mitsui must manage a very large funding burden, including a 1.64 trillion-yen bridge loan, debt and other financing. Its shares fell sharply after the deal became known. Mitsui says it aims to regain a sound financial position within three years, making execution and asset sales central to the industry’s next phase.

Mitsui Chemicals is not planning to keep every part of JSR indefinitely. It says it will sell JSR’s life-sciences unit and other non-core businesses after completing the acquisition. The purpose is to raise JSR’s value and improve the combined company’s financial position.

The mechanism is a sharper business focus. JSR is important to Mitsui because of its chipmaking materials, including photoresists. Businesses outside that focus can be sold, producing proceeds that may support the balance sheet. Mitsui is also using major loans, debt, equity and mezzanine financing to fund the purchase.

The plan matters because the acquisition is financially large. Mitsui’s market capitalisation was only 664.6 billion yen, compared with the 1.84 trillion-yen purchase price. Market participants have already raised funding concerns. Mitsui says the asset sales and broader restructuring should help it regain a sound financial position within three years.

Making a chip involves building detailed circuit patterns on a semiconductor wafer. Materials such as photoresists help convert those patterns into physical structures. The photoresist coats the wafer, responds to patterned light, and leaves selected areas protected or exposed for subsequent processing.

In practical terms, the material works as a temporary stencil. The wafer is patterned, processed where the design requires, and then prepared for further layers. Repeating these material-and-processing steps allows increasingly complex circuits to be formed. The article’s central example is JSR’s photoresists, which transfer circuit patterns onto semiconductor wafers.

This places materials companies inside the core chipmaking process, rather than at its edge. Their products affect whether manufacturers can reproduce circuit designs accurately. Mitsui wants to expand its chip-materials business through JSR, while Japan’s government-backed institutions support consolidation intended to strengthen the country’s semiconductor supply chain and competitiveness.