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| Resonac Brake Corporation | ||||||||
| Resonac Business Service Corporation | ||||||||
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| Resonac Kenzai Corporation | ||||||||
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| SunAroma Corporation | ||||||||
| Hyperpack Corporation | ||||||||
| Niigata Showa Co., Ltd. | ||||||||
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| 株式会社レゾナック軽金属 |
Started manufacturing ammonium sulfate using domestic technology (Showa Fertilizers K.K.)
Industrialized domestically produced aluminum (Nihon Iodine K.K.)
Showa Denko and Showa Denko Materials (formerly Hitachi Chemical) merged, giving birth to the holding company Resonac Holdings Co., Ltd.
Established: June 1939
Resumed production of ammonium sulfate fertilizer
Achieved domestic production of synthetic resin emulsion
Achieved domestic production of unsaturated polyester resin
Resonac Co., Ltd. was established.
Established: October 1962
Achieved domestic production of vinyl ester resin
Oita Petrochemical Complex started commercial operation
Developed the “Cojunal Method”, a high-purity aluminum refining
Started manufacture and sale of aluminum cylinders
Expanded into the hard disk business
Acquired Hitachi Chemical Company, Ltd. (presently Showa Denko Materials Co., Ltd.)
Became Resonac Holdings Corporation and Resonac Corporation, integrating Showa Denko K.K and Showa Denko Materials Co.,Ltd.
On January 1, 2023, Showa Denko and Showa Denko Materials (formerly Hitachi Chemical) merged, forming the holding company 'Resonac Holdings Co., Ltd.' and the operating company 'Resonac Co., Ltd.'
Spun off the petrochemical business to form Crasus Chemical Inc.
Resonac Holdings Corporation’s U.S. subsidiary, Resonac America, Inc., has invested as a strategic limited partner in Matter Venture Partners Fund II, L.P. The investment aims to accelerate Resonac’s R&D activities by staying at the forefront of emerging technology trends and identifying new business opportunities.
Resonac Corporation announced a joint demonstration program with Matlantis, showcasing the new Matlantis Case Studio feature for the universal atomistic-level simulator Matlantis™. The feature, designed to support ambidexterity in experimentation and computational science, is slated for release as an alpha version.
Resonac Corporation has successfully grown and processed 300 mm (12-inch) silicon carbide single-crystal substrates, among the largest SiC sizes under development. The achievement advances production of high-quality SiC substrates and epitaxial wafers for next-generation electronics.
Resonac Holdings Corporation announced that its integrated report, RESONAC REPORT 2026, is now available on its website. The report marks the fourth year since the business integration that Resonac calls its “Second Founding” and focuses on “Phase 2 of Resonac’s Second Founding: Taking on New Growth Challenges.” It highlights sustainability as a key to the company’s future growth.
Resonac, in collaboration with QC Ware, has demonstrated a technology that can perform transition state calculations—critical for chemical reaction analysis—at a speed approximately 28 times faster than conventional methods. This contributes to improving the efficiency of semiconductor material development.
Resonac has decided to make additional investments in its Singapore manufacturing base to expand production capacity in response to increased storage demand driven by AI adoption. Additionally, a price revision has been agreed upon.
Resonac has introduced a framework aimed at standardizing and expanding AI agents developed by employees, achieving a 95% adoption rate within 6 months and a monthly productivity increase of $2.9 million.
Resonac Holdings Corporation received the Environment Minister’s Award at the 25th Green and Sustainable Chemistry Awards for its resource-circulation business, which produces basic chemicals from used plastics.
Resonac will begin production of high-purity fluorine gas at its Tokuyama plant in Yamaguchi Prefecture in 2026, establishing a dual-production system in Japan alongside its existing Kawasaki plant.
Resonac announced that it has signed an MOU with BEAM TECHNOLOGIES and Japan LEO Shachu to pursue semiconductor manufacturing in low Earth orbit.