
| August 1962 | Transferred control of heat exchanger business from Mitsubishi Electric Corporation Itami Works to Toyo Electric Tada Works |
|---|---|
| November 1963 | Established Tada Electric Co., Ltd. (Capital: 40 million yen, 100% capitalized by Mitsubishi Electric Corporation) Head Office Location: Kawanishi City, Hyogo Took over and continued operation of heat exchanger business from Toyo Electric Corporation's Tada Works |
| October 1973 | Constructed Okayama Works (Increased capital to 150 million yen, 100% capitalized by Mitsubishi Electric Corporation) |
| October 1980 | Increased capital to 300 million yen (100% capitalized by Mitsubishi Electric Corporation) |
| January 1982 | Started manufacture of ozone generators |
| November 1985 | Started semiconductor test business (Transferred from Mitsubishi Electric Corporation, Kita-Itami Works) |
| February 1989 | Constructed Semiconductor Works |
| December 1994 | Constructed Okayama 2nd Works |
| April 2001 | Established the Industrial Apparatus Works (Transferred from Mitsubishi Electric Corporation, Transformation of System Electrical Energy-Traffic System Business Office) |
| April 2007 | Split up and devolved semiconductor business |
| June 2007 | Head Office moved from Kawanishi City to Amagasaki City. |
| April 2009 | Received transfer of heat exchanger business from Nihon Kentetsu Co., Ltd. Note:Renamed Okayama Works to Heat Exchanger Works |
| May 2014 | Established the Tokyo Sales Office |
| October 2014 | Constructed 3rd Factory of Heat Exchanger Works |
| February 2022 | Constructed New Painting Factory of Heat Exchanger Works |
| April 2023 | Electron beam processing machine Started after-sales service business |