| 1919 | Tosa Denka Kogyo Co., Ltd. established Started the trial manufacture of ferro-chrome |
|---|---|
| 1942 | Constructed a 1,800 KVA electric furnace (#1) for carbide |
| 1956 | Signed a partnership with Toa Gosei Kagaku Kogyo Co., Ltd. (present: Toa Gosei Co., Ltd.) Changed company name to TOYO DENKA KOGYO Co., Ltd. Greatly expanded business |
| 1957 | Constructed a 5,000 KVA electric furnace (#5) for ferro-alloy and a 13,000 KVA electric furnace (#6) for carbide |
| 1960 | Powered up #6 furnace to 15,000 KVA |
| 1961 | Constructed a 18,000 KVA electric furnace (#7) for carbide and two quick lime combustion furnaces |
| 1965 | Constructed a 12,000 KVA electric furnace (#8) for ferro-alloy Started the manufacture of TOYO POWDER (ferro-alloy processed product) |
| 1967 | Constructed calcium phosphate for feed facilities Constructed a 7,500 KVA electric furnace (#10) for ferro-alloy |
| 1969 | Constructed a serpentine mining plant |
| 1970 | Constructed a 40,000 KVA electric furnace (#11) for ferro-silicon |
| 1978 | Started the manufacture of a graphite spheroidizing agent for cast metal (special alloy) |
| 1981 | Constructed calcium carbonate facilities |
| 1982 | Started manufacture of Lincar Pellet |
| 1988 | Started operations at Chiba Logistics Center |
| 1993 | Opened Beijing Office |
| 1995 | Established a Chinese joint venture called ZHEN JIANG DONFENG SPECIAL ALLOY Co., Ltd. |
| 1999 | Started the manufacture of cored wire |
| 2001 | Established TOYO HYMOLD INTERNATIONAL Pte. Ltd. in Singapore |
| 2004 | Renovated head office building |
| 2005 | Opened Shanghai Office Acquired ISO14001 Established a Chinese joint venture called XICHANG TOYO LIAMGZAI SPECIAL ALLOY Co., Ltd. |
| 2007 | Established TOYO HEISEI POLYMER Co., Ltd. with the merger of TOYO CHEMICAL Co., Ltd, and HEISEI POLYMER Co., Ltd. |
| 2009 | Established TOYO BUSINESS SOLUTIONS Co., Ltd. Established TOYO DENKA TECHNO RESEARCH Co., Ltd. |
| 2010 | Started operation of a silicon metal pulverization plant |
| 2011 | Started operation of ash tech beads manufacturing facilities |
| 2014 | Started operation of special ferro-alloy manufacturing facilities at HYMOLD (THAILAND) Ltd. |
| 2016 | Set up tsunami evacuation facilities in our Head Office plant Constructed a 2 T high-frequency furnace for special alloys |
| 2018 | Completed the office annex (and tsunami evacuation building) |
| 2019 | Marked the 100th anniversary since our foundation |
| 2021 | Started operation of new cored wire plant |
