Producer
JSR Corporation
JSR Corporation (Tokyo; formerly JASDAQ/TSE: 4185; now private after delisting following Japan Investment Corporation nationalization in 2023) is Japan's leading life science materials company and manufacturer of Amsphere A3 Protein A affinity resin — one of the fastest-growing Protein A resin brands. JSR's Amsphere A3 uses a novel polymer bead architecture (highly cross-linked polymethacrylate) with proprietary recombinant Protein A ligand — designed for high dynamic binding capacity and long resin lifetime. In April 2023, the Japanese government's sovereign industrial fund INCJ (Innovation Network Corporation of Japan, now JIC) acquired a majority stake in JSR Corporation and took it private — an extraordinary step justified by JSR's dual strategic importance in semiconductor photoresists (JSR is the world's #2 photoresist producer, supplying TSMC and Samsung) and bioprocess materials (Amsphere A3). Japan explicitly nationalized JSR to prevent acquisition by non-Japanese parties and to secure domestic control of critical semiconductor and bioprocess supply chains — a template for strategic industry policy that no other major economy had applied to a life science materials company.
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Inputs supplied
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Goods downstream
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Facilities
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Stories
What they make
5 inputs JSR Corporation supplies
Click an input to see every good that depends on it, every country that produces it, and every other company in the supply chain.
chemical
EUV/ArF Semiconductor Photoresists →
chemical
EUV Photoresist →
chemical
Specialty Semiconductor Process Chemicals →
chemical
Solution styrene-butadiene rubber (SSBR) →
manufactured
Protein A chromatography resin (mAb) →
Where it shows up
Goods downstream
Essential goods that depend on something JSR Corporation makes — pick one to see the full supply chain.
Where they make it
5 facilities
JSR Corporation -- Yokkaichi, Mie Prefecture →
JPYokkaichi, Mie Prefecture, Japan · chemical_plant
JSR primary SSBR production; Yokkaichi petrochemical complex. JSR was taken private by Japan Investment Corporation (JIC) in 2023 -- extraordinary government intervention to protect JSR's strategic position in both tire SSBR and semiconductor photoresists. Two completely different industries, same Japanese state concern about losing control.
JSR Life Sciences Tsukuba R&D and Manufacturing →
JPIbaraki · resin-manufacturing
JSR Corporation's life sciences R&D and Amsphere A3 Protein A resin production facility in Tsukuba Science City, Ibaraki Prefecture. JSR's Protein A resin manufacturing capacity expanded significantly post-2020 in response to COVID-era bioprocessing demand surge. Tsukuba facility also produces JSR's semiconductor photoresist R&D materials.
JSR Ochang EUV MOR Plant (South Korea) →
KRNorth Chungcheong Province · manufacturing
World's first semiconductor-grade EUV Metal-Oxide Resist (MOR) production facility; Ochang, North Chungcheong Province, South Korea. Mass production scheduled 2026. MOR is next-generation EUV photoresist with superior EUV absorption and thermal stability vs. current Chemically Amplified Resists (CAR). JSR's strategic pivot to Korea reduces single-country Japan concentration and builds local supply for Samsung/SK Hynix. Source: https://www.koreaherald.com/article/3852712
JSR Yokkaichi Photoresist Plant →
JPYokkaichi, Mie Prefecture · photoresist_manufacturing
Primary JSR photoresist manufacturing facility. Produces ArF, KrF, and EUV photoresists shipped globally to Samsung, SK Hynix, TSMC, Intel, and Micron. Post-nationalization (2023), now strategically managed under Japan's INCJ.
JSR Yokkaichi Photoresist Plant (Mie Prefecture) →
JPMie Prefecture · manufacturing
JSR's primary photoresist manufacturing facility in Yokkaichi, Mie Prefecture, Japan. Produces JSR's EUV photoresist portfolio including ArF immersion resists and the full EUV chemical lineup. Yokkaichi is JSR's historic industrial base — the company's original synthetic rubber operations were located here. The facility co-located photoresist synthesis, purification, and quality control operations to minimize contamination risk. A contamination event or disruption at Yokkaichi would affect ~30-35% of global EUV photoresist supply immediately. Source: https://www.jsr.co.jp/en/aboutjsr/ir/
What else they do
Business segments
The company's full revenue map — where this supply-chain role fits within their broader business.
Semiconductor Photoresists (World #2)
45%Bioprocess Materials (Protein A + Life Science)
20%Synthetic Rubber (Original Business)
25%Display + Other Materials
10%
Stories from the supply chain
Editorial about JSR Corporation
Intelligence
What's known
Sourced claims about this company's role in supply chains — chokepoints, concentration, incidents, dual-use connections.
Did you know2023
In April 2023, the Japanese government's Japan Investment Corporation (JIC) completed a tender offer acquiring a majority stake in JSR Corporation and taking it private at a total enterprise value of approximately ¥900 billion ($6.5B). The Japanese government's stated rationale was that JSR occupies simultaneous strategic positions in two critical technology supply chains: (1) semiconductor photoresists — JSR is the world's #2 photoresist producer (after Shin-Etsu Chemical), supplying ArF immersion and EUV photoresists to TSMC, Samsung, and Intel; and (2) bioprocess materials — JSR's Amsphere A3 Protein A resin is validated in commercial mAb manufacturing at Chugai Pharmaceutical, a Roche group company. Japan nationalized JSR to prevent acquisition by non-Japanese parties (explicitly including Chinese industrial acquirers and US private equity). The nationalization was only the second time a G7 government had explicitly nationalized a listed industrial company for supply chain security reasons in the 21st century. JSR's dual strategic position — making both the photoresists that define chip geometry and the Protein A resins that purify cancer drugs — was treated as an unacceptable concentration of critical technology ownership risk in private hands.
Reuters ↗Concentration2023
In June 2023, Japan's government completed the privatization of JSR Corporation — taking it off the Tokyo Stock Exchange via a ¥904 billion (~$6.2B) tender offer by Japan Industrial Solutions (JIS, formerly INCJ — Innovation Network Corporation of Japan). Japan's Ministry of Economy, Trade and Industry (METI) explicitly justified the nationalization by classifying JSR's semiconductor photoresist technology as critical national infrastructure requiring government ownership to prevent foreign acquisition. JSR originated in 1957 as 'Japan Synthetic Rubber Company' — a commodity rubber manufacturer formed as a joint venture with the US Goodrich/Shell partnership — and spent 40 years transitioning from synthetic rubber to specialty semiconductor chemicals. When JSR's photoresist technology became geopolitically significant (Japan-Korea 2019 export controls; US-China semiconductor decoupling), the Japanese government decided the world's largest photoresist company could not remain publicly traded. This is the clearest example of any G7 government treating a semiconductor supply chain company as a national security asset requiring state ownership — not just export controls, but full nationalization.
JSR Corporation ↗