1950

• Commenced manufacture and sale of small electric motors under the name Showa Denki Seisakusho at the location of what is now the Osaka Branch Office.

1954

• Received a license to manufacture AC motors and other applied equipment from the Minister of International Trade and Industry.
  Commenced full-scale production of blowers and power tools.

1956

• Incorporated as Showa Denki Co., Ltd., with 1 million yen in capital.

1964

• Completed construction of the Daito Factory located in Shindenkita-machi, Daito City.

1969

• Completed construction of a blower manufacturing facility at Shindensakai-machi, Daito City.

1974

• Completed construction of the Iga Factory and commenced operation there as Showa Furyoku Kikai Co., Ltd.

1975

• Received JIS Mark Certification from the Ministry of International Trade and Industry (MITI).
  (Certification No. 574148)

1983

• The Daito Factory was awarded the Osaka Bureau of MITI Director’s Award for Industrial Standardization and Excellence.

1984

• Opened the Tokyo Technical Service Center.

1985

• Expanded the Iga Factory buildings, adding a 300 kW testing facility. A heat-resistant test chamber for blowers was also installed.

1988

• Completed construction of a new office building on the Daito Factory site.

1989

• Enlarged and extended the Daito Factory buildings.

1992

• Completed construction of a new building to serve as the Tokyo Branch Office.

1997

• Daito Factory announced Mistresa (mist collector) CE marking.

1998

• Completed construction of a new building to serve as the Nagoya Branch Office.

1999

• Acquired ISO 9001 certification for the Daito Factory.

2000

• Acquired ISO 9001 certification for the Iga Factory.

2004

• Acquired ISO 14001 certification for the Daito and Iga Factories
• Completed construction of a new Daito Factory facility, and opened the Okayama Sales Office

2008

• Completed construction of a new building to serve as the Kanazawa Sales Office

2012

• Established Showadenki (Thailand) Co., Ltd.

2013

• Opened the Kyoto Sales Office

2015

• Completed construction of a new building to serve as the Tokyo Branch Office

2016

• Showa Furyoku Kikai Co., Ltd. (Iga Factory) changed its company name to Showa Denki Iga Co., Ltd.

2017

• Established Showa Denki (Korea) Co., Ltd. in Korea
• Established Showa Denki (Taiwan) Co., Ltd. in Taiwan
• Entered into a capital alliance with Nishikawa Manufacturing Company, Limited

2018

• Atsugi Sales Office closed and functions absorbed by the Tokyo Branch Office

2019

• Entered into a capital alliance with Chiyoda Fan & Blower Co., Ltd.

2020

• Closed the Kyoto Sales Office; relocated to the Shiga Sales Office

2022

• Opened the Kobe Office and Certified specially controlled medical device dealership and leasing

2023

• Established East Japan Technical Center and Central Japan Technical Center.
• Tokyo Branch Office and North Kanto Sales Office relocated to the East Japan Technical Center.
• Nagoya Branch Office was relocated to the Central Japan Technical Center.

2024

• Company name change
  Former Company Name ”SHOWA DENKI CO., LTD.”
  New Company Name ”SDG CO., LTD.”