|1958||Tokyo Heat Treatment Co., Ltd. established.
Yokohama plant commenced operations.
Yokohama factory commenced operations.
|1968||Nagoya factory commenced operations.|
|1973||Mohka plant commenced operations.|
|1981||Shiga plant commenced operations.|
|1985||Licensing of technology to HIGHTEMP FURNACES, LTD. (INDIA)|
|1987||Toyota plant commenced operations.
Hamamatsu plant (former Tenryu Netsushori Kogyo Co., Ltd.) commenced operations.
|1990||Handa plant commenced operations.|
|1991||Merged with DOWA MINING CO., LTD. DOWA Thermotech business operational headquarters established.|
|1997||DOWA THT AMERICA, INC. established.|
|2006||Holding company system implemented. (DOWA MINING CO., LTD. changed its name to DOWA Holdings Co., Ltd.)
CEMM Co., Ltd. joined Dowa Group.
|2008||DOWA THERMOTECH (THAILAND) CO., LTD. established
Ota plant commenced operations
Headquarters relocated to Nagoya-shi, Aichi.
|2010||Kunshan Dowa Thermo Furnace Co., Ltd. established.|
|2011||Development center established in Nagoya headquarters.
Acquired a controlling interest of HIGHTEMP FURNACES, LTD. (INDIA)
|2012||PT. DOWA THERMOTECH INDONESIA established.
PT. DOWA THERMOTECH FURNACES established.
|2015||Hamamatsu-kita plant commenced operations.
DOWA THERMOTECH MEXICO, S.A. de C.V. established.
|2016||New construction of heat treatment processing plant in Hamamatsu-kita plant.|
|2017||Research and development center established in Hamamatsu-kita plant.|