・Joetsu Denki (predecessor of Echigo Denki) formed.

・Joetsu Denki constructs the Zozo hydroelectric power station to exploit the extensive snowmelt of the Myoko mountain range and expand into the hydroelectric power business.

・Chuo Denki K.K. formed (in merger of Echigo Denki with Matsumoto Dento).

・Chuo Denki K.K. chemical industries division opens its Taguchi plant.
(Launched with acquisition of carbide producer Tokyo Denka Kogyo and zinc and ferro-manganese producer Nihon Aen in adjacent Taguchi, Myoko Kogen area.)

・Chuo Denki Kogyo Co., Ltd. formed.
(Partnership of Chuo Denki and Chichibu Denki Kogyo, predecessor of the current Showa Denko.)

・Production launched of low-carbon ferro-manganese with electrical furnaces at Myoko plant (formerly Taguchi plant).

・Sumitomo Group (currently the Sumitomo Metal Industries Group) joins company management.

・Production launched of electrolytic manganese metals.

・Listing on Niigata Stock Exchange.

・Listing on second section of Tokyo Stock Exchange.

・Production launched of ferroalloys at Kashima plant (with large electrical furnaces).

・Chuden Sangyo Co.,Ltd. (civil engineering and construction) formed.

・Production launched of manganese sulfates at Myoko plant (formerly Taguchi plant).

・Production launched of manganese carbonates at Myoko plant (formerly Taguchi plant).

・Production launched of zinc carbonates at Kashima plant.

・Production launched of trimanganese tetroxides (Mn3O4, or Sofmax) at Myoko plant (formerly Taguchi plant).

・Production launched of hydrogen storage alloys at Myoko plant (formerly Taguchi plant).

・Chuden Kosan Co.,Ltd. (environmental services, transport) formed.

・Municipal waste ash vitrification and detoxification operations launched at Kashima plant.

・Pronounced an "Earth-friendly company" in the field of resource conservation by Ibaraki prefecture.

・Shipping initiated of hydrogen storage alloys for use in hybrid vehicles.

・Waste melting and recycling center established at Kashima plant.

・Taguchi plant renamed Myoko plant.

・Myoko plant terminates production of trimanganese tetroxides and shifts to hydrogen storage alloys as its core operation.

・Kashima plant recognized as an "Ibaraki prefecture superior recycling facility".

・Change of address for Myoko headquarters and plant, together with Chuden Sangyo affiliate, (from Myoko Kogen-machi, Nakakubiki-gun, Niigata-ken to Myoko-shi, Niigata-ken) with the formation of the Myoko-shi municipality in Niigata prefecture.

・Renovation of electric furnace no. 1 at Kashima plant.

・Renovation of electric furnace no. 2 at Kashima plant.

・Acquired lithium-ion-battery negative-pole materials business from Sumitomo Metal Industries, Ltd.

・Acquired Sumikin Molycorp, Inc. as subsidiary, renamed Chuden Rare Earth Co.,Ltd.