|Dec-1919||Was established under the name of Osaka Transformer Co., Ltd.
Commenced the specialized production of pole-mounted transformers.
|Jul-1930||Moved its main plant to its current location (Yodogawa-ku, Osaka, Japan)|
|Mar-1934||Commenced the production of electric welding machines|
|Aug-1946||Established Shikoku Transformer Co. Ltd. (currently Shihen Technical Corporation) in Kagawa Prefecture in a joint venture with Shikoku Haiden K.K. (currently Shikoku Electric Power Co., Inc.)|
|Jun-1951||Established Osaka Fuse Co., Ltd., (currently DAIHEN FUSE Corporation) a manufacturing and sales company of power fuses.|
|Nov-1953||Listed on the rst section of the Osaka Securities Exchange|
|Oct-1959||Established Kyushu Transformer Co. Ltd. (currently Kyuhen Co., Inc.) in Fukuoka
Prefecture in a joint venture with Kyushu Electric Power Co., Inc.
|Sep-1960||Listed on the rst section of the Fukuoka Stock Exchang.|
|Jul-1961||Completed a welding machine production plant in Settsu City, Osaka(Settsu Plant).|
|Oct-1961||Listed on the rst section of the Tokyo Stock Exchange.|
|May-1965||Merged with Kanden Kanehira Seisakusho K.K., (currently Kanehira Plant).|
|Dec-1967||Completed a pole-mounted transformer production plant in Chitose City, Hokkaido.|
|Oct-1970||Established Tottori DAIHEN Co., Ltd. (currently DAIHEN Industrial Machinery Corporation) as the second production site for welding machines in Japan.|
|Nov-1973||Completed the Mie Plant and commenced the production of super voltage large capacity transformers.|
|Dec-1974||Established DAIHEN Stud Co., Ltd., a company dedicated to the welding of studs.|
|Mar-1979||Established OTC America Inc. (currently DAIHEN Inc.), a welding machine sales company, in the United States.|
|May-1980||Started the sales of arc welding robots.|
|Oct-1983||Established OTC Europe GmbH (currently OTC DAIHEN Europe GmbH), a welding machine sales company, in Germany.|
|Aug-1984||Established Oita DAIHEN K.K. (currently DAIHEN Technology Institute), a software development company.|
|Dec-1985||Changed the company name from Osaka Transformer Co., Ltd. to DAIHEN Corporation.
Established the corporate philosophy of "Reliability and Creativity."
|Feb-1986||Commenced the production of radio frequency (RF) generators for semiconductor manufacturing equipment.|
|Nov-1987||Won the Deming Execution Prize.|
|Apr-1989||Established DAIHEN (Thailand) Co., Ltd. (currently OTC DAIHEN Asia Co., Ltd.), a manufacturing company of welding machines, in Thailand.
Commenced the production of semiconductor wafer transfer robots.
|Aug-1989||Established a joint venture company specializing in the manufacturing and sales of large transformers (currently DAIHEN Electric Co., Ltd.) with a local Thai company.|
|May-1996||Established a sales company of semiconductor manufacturing-related equipment (DAIHEN Advanced Component, Inc.) in the United States.|
|Nov-1997||Established DAIHEN System Corporation, a sales company of power products.
Established Mudanjiang OTC Welding Machines Co., Ltd. as a production site of welding machines in China.
|Apr-1998||Established OTC (Taiwan) Co., Ltd., a welding machine sales company, in Taiwan.|
|Nov-1998||Acquired Osaka Denki Co., Ltd., a well-established manufacturer of welding machines, and turned it into a subsidiary.|
|Aug-2001||Established OTC Industrial (Shanghai) Co., Ltd., a welding machine sales company, in China.|
|May-2002||Established DAIHEN Korea Co., Ltd. as a base for semiconductor equipment business in Korea.|
|Sep-2002||Established DAIHEN Welding and Mechatronics System Corporation, a welding machine sales company.|
|Apr-2003||Developed 100 kW power conditioners for solar power generation ahead of anyone in the industry.
Established OTC Industrial (Qingdao) Co., Ltd. in Qingdao, China as the second production site of welding machines in China.
|Oct-2006||Established DAIHEN OTC (Beijing) Co., Ltd., a power products manufacturing and sales company, in Beijing, China.|
|Oct-2007||Newly opened Rokko Plant, a base for welding and mechatronics business, at Rokko Island in Kobe City (Closed Settsu Plant).|
|Dec-2009||Established DAIHEN Advanced Machinery (Changshu) Co., Ltd., a manufacturing, sales and after-services company of at panel display (FPD) transfer robots, in Changshu, China.|
|Nov-2010||Acquired MECS (wafer transfer robot) business.|
|Jun-2011||Established OTC DAIHEN India Pvt. Ltd., a welding machine sales company, in India.|
|Jul-2012||Established PT. OTC DAIHEN Indonesia, a welding machine sales company, in Indonesia.|
|Feb-2014||Acquired VARSTROJ d.d., a Slovenian welding machine manufacturing company. (DAIHEN VARSTROJ welding cutting and robotics d.d.)|
|Jul-2015||Acquired 60% shares of The Chugoku Electric Manufacturing Company, Incorporated. Started joint operations with THE CHUGOKU ELECTRIC POWER CO.,INC.|
|Mar-2016||Started the sales of wireless power transfer systems.|
|Oct-2016||Established DAIHEN MEXICO S.A. de C.V., a welding machine sales company, in Mexico.|
|Dec-2019||Acquired Laso Tech Systems GmbH , German System Integrator company.|