Company History

History of the Group

The Showa Denko 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 infomation/telecommunication industry and the automotive industry.

★Showa Denko K.K. ◆Showa Aluminum Corporation ●Showa Highpolymer Co., Ltd. (Topics written in orange are those about technology and products of the Showa Denko group.)

With the business on track under the spirit of “tenacity and indomitability”, established the foundation of the Showa Denko Group.
1908 ★Established Sobo Marine Products K.K.

Kawasaki Plant of Showa Fertilizers K.K.
Kawasaki Plant of Showa Fertilizers K.K.

the domestically produced first aluminium ingot
The domestically produced first aluminium ingot


◆Established Takada Aluminum Equipment Manufacturing K.K.

1926 ★Established Nihon Iodine K.K.
1928 ★Established Showa Fertilizers K.K.

★Started manufacturing ammonium sulfate using domestic technology (Showa Fertilizers K.K.)


★Industrialized domestically produced aluminum (Nihon Iodine K.K.)

1937 ●Established Riken Kohaku Kogyo K.K.
1939 ★Established Showa Denko K.K.
Deepened and further developed business, taking advantage of postwar reconstruction and rapid growth

★Resumed production of ammonium sulfate fertilizer

Aluminium can production line
Aluminium can production line

Oita Petrochemical Complex
Oita Petrochemical Complex


●Achieved domestic production of synthetic resin emulsion


●Achieved domestic production of unsaturated polyester resin


●Achieved domestic production of vinyl ester resin

  • ◆Showa Aluminum Can Corporation produced the first aluminum can in Japan
  • ★Oita Petrochemical Complex started commercial operation
  • ◆Developed the “Cojunal Method”, a high-purity aluminum rening method
  • ◆Started aluminum can collection activities at certain plants
Switched to energy-saving products after overcoming oil crises

◆Started manufacture and sale of aluminum cylinders

Aluminum cylinders for laser beam printers
Aluminum cylinders for laser beam printers

Showa Denko Carbon, Inc.
Showa Denko Carbon, Inc.

  • ★Expanded into the hard disk business
  • ★Acquired a graphite electrode business in the United States, and established Showa Denko Carbon, Inc.

◆Started company-wide aluminum can recycling activities

1995 ★Formulated “Responsible Care Action Guidelines”
1997 ★Published Responsible Care Report
1998 ★Established “Our Code of Conduct”
Expanded into the energy-saving and high value-adding business in full-scale, through the fusion of organic/inorganic and aluminum technologies.
  • ★◆With the merger with Showa Aluminum Corporation as the trigger, expanded aluminum can recycling activities to Showa Denko’s plants, office and group companies
  • ★◆Merged Showa Aluminum Corporation

Hard disks
Hard disks

RC Charter
RC Charter


★Started the business to recycl used plastic as material for ammonia at Kawasaki Plant

  • ★Started mass production of perpendicular magnetic recording hard disks first in the world
  • ★Issued a CSR Report
  • ★Signed the “RC Charter”
  • ★Made Showa Tansan Co., Ltd. (presently Showa Denko Gas Products Co., Ltd.) a consolidated subsidiary
  • ★Received the “Kurumin”
  • ★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.
Engaged in Shaping Ideas in pursuit of evolving chemical company with individualized products through the fusion of organic/inorganic and aluminum technologies

★Received the 43rd Ichimura Industrial Award for the “development of cooling devices for power control units”

Cooling devices for power control units
Cooling devices for power control units

Plant Growth Facility
Plant Growth Facility


★Established “Our Code of Conduct and Its Practical Guide”

  • ★Our LED lighting equipment for plant growth received the “Nikkei Business Daily Merit Award” of the 2012 Nikkei Superior Products & Services Award
  • ★Our long history of aluminum can recycling activities received the “Minister of Economy, Trade and Industry's Prize” of the 3Rs (Reduce, Reuse, and Recycle) Promotion Merit Awards in FY 2013
  • ★Acquired Hanacans of Vietnam, a can maker
  • ★Re-signed the amended Responsible Care Charter
  • ★Received the Special Incentive Award of the “Ikumen Company Award 2014” sponsored by the Ministry of Health, Labour and Welfare

★Selected as one of the Thomson Reuters 2015 Top 100 Global Innovators

  • ★Made SunAllomer Ltd. a consolidated subsidiary
  • ★Acquired SGL GE, a company engaged in the graphite electrode business (presently SHOWA DENKO CARBON Holding GmbH)
  • ★Established Advanced Battery Materials Division
We offer solutions beyond manufacturer’s limits, pursuing “Maximization of CUSTOMER Experience”
  • ★Established Coating Materials Department

Kawasaki Plastic Recycling Plant

  • ★Received award for used-plastic chemical recycling business
  • ★Acquired Hitachi Chemical Company, Ltd. (presently Showa Denko Materials Co., Ltd.)
  • ★Joined “The Valuable 500”

Top of page