- 1937
- Established "Sangyo Boeki Syokai"at Marunouchi building in Marunouchi, Chiyoda-ku,Tokyo.
Started to sell and import electrical parts of automobiles,ships,airplanes and electrical insulaing. - 1948
- Renamed "Chiyoda Denshi co.ltd."
- 1951
- Established and Extended Shiba branch in Shibanakamon-mae, Minato-ku, Tokyo.
- 1959
- Extended Shiba branch and move head office from Marunouchi building to Minato-ku
- 1961
- Established Kumagaya branch in Kumagaya city,Saitama.
- 1966
- Established Nagano branch in ueda city,Nagano.
- 1968
- Established Koriyama branch in Koriyama city,Fukushima.
- 1969
- Build and move new head office to 2-chome,Mita,Meguro-ku,Tokyo(at present).
- 1970
- Estabhshed a delivery center at 1-chome, Mita,Meguro-ku,Tokyo(at present).
- 1973
- Established an affiliated company processing tapes "DenshikaKo co.,ltd." in Ota-ku,Tokyo.
- 1979
- Build new delivery center at same place,and move Denshi Kako co.,ltd to new delivery center.
- 1981
- lncreasing the capital ¥50,000,000.
- 1982
- Established Kyusyu branch (Kyusyu branch office at Present) in Kagoshima city.
- 1984
- Build and moved new Koriyama branch, and renamed Tohoku branch.
- 1990
- Extended Kumagaya branch.
- 1993
- Extended head office.
- 2001
- Rebuild Nagano branch.
- 2002
- Certified IS014001 at head office,branches, delivery center and Denshi Kako co.,ltd.
Established "Chiyoda Denshi (HK)ltd." in HongKong. - 2007
- Established "Thai Chiyoda Denshi co.,ltd."in Bangkok.
- 2008
- Held 70th anniversary of the founding.
Rebuild head office. - 2012
- Established " CHIYODA DENSHI TRADING (SHANGHAI) co.,ltd " in Shanghai.
- 2017
- Held 80th anniversary of the founding.
Certified IS09001 at head office,branches, delivery center and Denshi Kako co.,ltd.
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