Mercury use in our products History
1944
TOA Electronics Ltd. established in Koishikawa Ward (Current Bunkyo Ward), Tokyo
1945
DKK Corporation established in Musashino-City, Tokyo
1954
HM-5 (A) benchtop pH meter released.
Became a top seller with sales of over 20,000 units.
Recognized as “Analytical and Scientific Instrument Heritage” in 2014.
1961
Listed on the 2nd Section of the Tokyo Stock Exchange
1963
New factory built in Sayama city, Saitama prefecture (current Sayama Technical Center)
DKK Corporation participated in a project organized by the then Ministry of Health and Welfare to develop Japan’s first automated nitrogen oxide analyzer. Since then, we have cultivated the field of ambient air analyzers which has bacome our main product range.
1968
Head office built in Takadanobaba, Shinjuku ward, Tokyo.
1970
Developed Japan’s first "river water quality monitor" for the Yodo and Tama rivers at the request of the former Ministry of Construction.
1973
TOA Iwate Electronics Ltd. (Current DKK-TOA Iwate Corporation) established as a subsidiary in Tono city, Iwate prefecture.
1979
Obtained approval to develop medical instruments from the former Ministry of Health and Welfare and started sales of clinical examination devices.
Entered the field of biochemical and medical-related equipment.
1989
Tokyo Factory (current Tokyo Engineering Center) built by Denki Kagaku Keiki Co., Ltd. in Higashiyamato city, Tokyo.
1990
DKK Yamagata Co., Ltd. (Current DKK-TOA Yamagata Corporation) established by Denki Kagaku Keiki Co., Ltd. as a subsidiary in Shinjo city, Yamagata prefecture.
1995
Acquired ISO9001 certification
2000
DKK-TOA Corporation was formed.
Acquired ISO14001 certification
2002
Total nitrogen/phosphorous/COD automatic analyzer NPW-150 model (current NPW-400 model) released to comply with the 5th standards for controlling total emissions.
2003
Compact, A4-sized automatic city water quality analyzers MWA4-70 model (current MWB4-72 model) delivered to 78 locations in the Tama area, Tokyo.
2005
Bionics Instrument Co. Ltd. acquired as a wholly owned subsidiary by share exchange. Industrial gas detector division expanded.
Entered into business and capital alliance agreement with HACH
2006
Became the sole distributor of Hach products in Japan.
Extended buildings and new lead-free production line established at DKK-TOA Yamagata Corporation
2010
New R&D Center opened at Sayama Technical Center.
2013
Listed on the First Section of the Tokyo Stock Exchange.
2014
Environment Monitoring Station built at Sayama Technical Center
70th anniversary of founding.
2015
Seoul office opened.
2017
New factory for medical-related devices built at Sayama Technical Center.