Company History
Resonac Group started its operations by focusing on the future possibilities of the electrochemical industry, which utilized one of Japan's important resources: abundant water energy. Originating from electrochemistry, our Group’s technology further evolved to cover the fields of inorganic chemistry, organic chemistry and metal materials. Today, the technology is inherited to wide variety of products that are essential in everyday life, including materials and components used in the information/telecommunication industry and the automotive industry.
Resonac Group
| 2023 | Became Resonac Holdings Corporation and Resonac Corporation, integrating Showa Denko K.K and Showa Denko Materials Co.,Ltd. |
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Former Showa Denko K.K.
| 1908 | Established Sobo Marine Products K.K. |
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| 1921 | Established Takada Aluminum Equipment Manufacturing K.K. |
| 1926 | Established Nihon Iodine K.K. |
| 1928 | Established Showa Fertilizers K.K. |
| 1931 | Started manufacturing ammonium sulfate using domestic technology (Showa Fertilizers K.K.) |
| 1934 | Industrialized domestically produced aluminum (Nihon Iodine K.K.) |
| 1937 | Established Riken Kohaku Kogyo K.K. |
| 1939 | Established Showa Denko K.K. |
| 1945 | Resumed production of ammonium sulfate fertilizer |
| 1951 | Achieved domestic production of synthetic resin emulsion |
| 1953 | Achieved domestic production of unsaturated polyester resin |
| 1965 | Achieved domestic production of vinyl ester resin |
| 1969 | Oita Petrochemical Complex started commercial operation |
| 1981 | Developed the “Cojunal Method”, a high-purity aluminum refining |
| 1986 | Started manufacture and sale of aluminum cylinders |
| 1988 | Expanded into the hard disk business Acquired a graphite electrode business in the United States, and established Showa Denko Carbon, Inc. |
| 2001 | Merged Showa Aluminum Corporation |
| 2003 | Started the business to recycle used plastic as material for ammonia at Kawasaki Plant |
| 2005 | Started mass production of perpendicular magnetic recording hard disks first in the world |
| 2008 | Made Showa Tansan Co., Ltd. (presently Showa Denko Gas Products Co., Ltd.) a consolidated subsidiary |
| 2009 | Started production of cooling devices for power control units Integrated the hard disk business of Fujitsu Limited and launched Showa Denko HD Yamagata K.K. |
| 2010 | Merged Showa Highpolymer Co., Ltd. |
| 2016 | Made SunAllomer Ltd. a consolidated subsidiary |
| 2017 | Acquired SGL GE, a company engaged in the graphite electrode business (presently SHOWA DENKO CARBON Holding GmbH) Established Advanced Battery Materials Division |
| 2019 | Established Coating Materials Department |
| 2020 | Acquired Hitachi Chemical Company, Ltd. (presently Showa Denko Materials Co., Ltd.) |
Former Showa Denko Materials Co.,Ltd.
| 1912 | Hitachi, Ltd. began research into electrical insulating materials for electrical machinery. This is the origin of Hitachi Chemical. |
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| 1932 | Started production of laminate. |
| 1939 | Started production of carbon brushes. |
| 1955 | Started production of copper clad laminate. |
| 1962 | Hitachi Chemical Co., Ltd. was established as a separate entity. |
| 1963 | Began business by taking over the assets of the Chemical Products Division of Hitachi, Ltd. |
| 1978 | Started selling photosensitive film of alkali-based solvents. |
| 1984 | Started production of circuit connecting film for displays.. |
| 1992 | Started selling reflow-resistance epoxy molding compounds. |
| 1998 | Started high-volume production of carbon anode materials for lithium-ion batteries. Started manufacturing CMP slurries for STI (shallow trench isolation). |
| 2001 | Started manufacturing molded plastic rear door modules. |
| 2013 | Headquarters moved from Tokyo's Shinjuku Ward to Chiyoda Ward. |
| 2014 | Absorbed Hitachi Powdered Metals Co., Ltd.. |
| 2016 | Absorbed Hitachi Kasei Polymer Co., Ltd.. |
| 2017 | FIAMM Energy Technology S.p.A. became a consolidated subsidiary of Hitachi Chemical Co., Ltd. PCT, LLC, a Caladrius Company (currently, Minaris Regenerative Medicine, LLC) became a wholly-owned subsidiary of Hitachi Chemical Co., Ltd. ISOLITE GmbH became a wholly-owned subsidiary of Hitachi Chemical Co., Ltd. |
| 2018 | Kyowa Medex Co., Ltd. (currently, Minaris Medical Co., Ltd.) became a consolidated subsidiary of Hitachi Chemical Co., Ltd. |
| 2019 | apceth Biopharma GmbH (currently, Minaris Regenerative Medicine GmbH) became a wholly-owned subsidiary of Hitachi Chemical Co., Ltd. |
| 2020 | Became a consolidated subsidiary of Showa Denko K.K. Changed company’s name to Showa Denko Materials Co., Ltd. |
| 2021 | Spun off Regenerative Medicine Business Sector (Yokohama Site) to form Minaris Regenerative Medicine Co.,Ltd. |