Mitsui Chemicals to Buy Chip Materials Maker JSR for $11.6 Billion
Direct answer
Mitsui Chemicals will buy JSR, one of the world’s leading makers of the special chemicals used to print circuits onto computer chips, in a deal worth 1.84 trillion yen, about $11.6 billion. The deal was agreed on Monday, November 9, 2026, and it still needs approval from regulators before it can close.
What happened
Mitsui Chemicals and the state-backed Development Bank of Japan will buy all of JSR from funds run by JIC Capital, the private equity arm of state-backed Japan Investment Corp. JIC took JSR private in 2024, paying 900 billion yen, and said at the time it planned to use the business to drive consolidation in Japan’s chip materials industry.
The price breaks down into 1,392.1 billion yen of equity value, including the Development Bank of Japan’s investment, and 447.9 billion yen of interest-bearing debt and other items. The Development Bank of Japan will invest 200 billion yen and hold non-voting preferred shares, so Mitsui will hold all voting rights after completion.
Mitsui will fund the deal with a 1.64 trillion yen bridge loan from its main banks. It also plans to sell up to 150 billion yen of new shares to help pay for the deal, with bank loans, bonds and other financing to follow.
JSR makes photoresists, light-sensitive chemicals that let chip factories print fine circuit patterns onto silicon wafers. Its customers include Taiwan Semiconductor Manufacturing, Intel and Samsung. Mitsui said JSR will sit at the centre of its information and communications technology business, alongside its own chip materials such as pellicles and tapes used in chip packaging.
Mitsui said the deal is the largest ever in Japan’s chemicals sector. It aims to close the deal in the second half of the fiscal year ending March 2028, and it expects about 40 billion yen of extra annual profit from the deal by fiscal 2035. Mitsui shares fell sharply in Tokyo on Monday as investors weighed the cost of the deal. Reuters reported the agreement on November 9, 2026.
Why it matters for beginners
Chips sit inside phones, cars, computers and many everyday devices. Photoresist is a small but vital ingredient in making them, and only a few companies in the world make the advanced kind. A deal like this shapes who controls a key part of the chip supply chain, which is why Japan’s government is backing consolidation so its materials makers can compete at a bigger scale.
Big takeovers also move share prices. A buyer’s shares can fall when investors worry about the price paid or the debt taken on to fund the deal, even when the long-term plan looks sound. That is what happened to Mitsui on Monday.
Many beginners hold chip stocks through funds rather than single shares. If you are new to that idea, read our guide What Is an ETF and How Is It Different From a Stock?.
What to watch next
Regulators in Japan and other countries must clear the deal, so watch for any delay or conditions attached to approval. Watch how Mitsui pays down the 1.64 trillion yen bridge loan, including the planned sale of up to 150 billion yen in new shares. Mitsui also plans to sell off JSR’s life sciences unit and other non-core businesses, so watch which parts are sold and for how much. Finally, watch whether other Japanese chemical makers follow with their own deals, since the government has pushed for consolidation across the sector.
FAQ
What does JSR make?
JSR makes photoresists, light-sensitive chemicals used to print circuit patterns onto silicon wafers during chip manufacturing. It also makes materials used in other chip production steps, and it owns Inpria, a US maker of materials for extreme ultraviolet lithography.
Why is Mitsui buying JSR?
Mitsui wants to build a bigger chip materials business. It plans to combine JSR’s advanced photoresists with its own products, such as pellicles that protect photomasks and tapes used in chip packaging, and to serve the same large chipmaker customers at a larger scale.
How big is the deal?
The deal is worth 1.84 trillion yen, about $11.6 billion, including debt and other items. It is the largest deal yet in Japan’s chemicals sector.
When will the deal close?
Mitsui aims to complete the deal in the second half of the fiscal year ending March 2028. The schedule could change, because the deal needs competition and foreign investment approvals in Japan and other countries.
Who owned JSR before this deal?
Funds managed by JIC Capital, the private equity arm of state-backed Japan Investment Corp, which took JSR private in 2024 for 900 billion yen.
Sources
Reuters, “Mitsui Chemicals to buy chip materials firm JSR for $11.6 billion”, November 9, 2026. https://srnnews.com/mitsui-chemicals-and-dbj-to-buy-jsr-for-11-6-billion-filing-shows/
TechNode Global, “Mitsui Chemicals to acquire JSR for 1.84T yen”, November 9, 2026. https://technode.global/2026/11/09/mitsui-chemicals-jsr-acquisition/
This article is for general information and education only. It is not legal or financial advice.
