Showa Denko KK

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Showa Denko KK operates as a chemical company in Japan and internationally. The aluminium division offers rolled, extruded and forged products. Its inorganic division specializes in the production of graphite electrodes, alumina and aluminium hydroxide. The company was established in 1939 and is based in Tokyo, Japan.


  • 13-9, Shiba Daimon 1-Chome, Minato-ku  

Town, State, Country

  • Tokyo, Japan  


  • 105-8518 
  • Chairman Kyohei Takahashi
  • Year Established 1939
  • Ownership The Master Trust Bank of Japan Ltd, 5.36%
  •   Japan Trustee Services Bank Ltd (T), 3.84%
  •   Japan Trustee Services Bank Ltd (T9), 3.78%
  •   National Mutual Insurance Federation of Agricultural Cooperatives, 3.00%
  •   Others, 80.34%
  •   Fukoku Mutual Life Insurance Co, 3.68%
  • End User Industries Petrochemical, chemical, metallurgy, electronics, batteries


  • ISO 9000
  • ISO/TS 16949
  • ISO 14001
  • ISO 9001
  • ISO 14001


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