| Mar.2020 | Acquisition of Oak-Mitsui Inc. (a copper foil manufacturer in SC, US). The company name was changed to Denkai America Inc. |
|---|---|
| Oct.2019 | Nippon Denkai Holdings Ltd.merged Nippon Denkai, Ltd. At the same time the trade name of surviving company was change to Nippon Denkai, Ltd. |
| Jun.2018 | Electrodeposited copper foil exclusive for batteries operation started. |
| Feb.2017 | Reduced capital to 100 million yen. |
| Sep.2016 | Shareholder changed to MSD Investments Ltd. |
| 2014 | Started sales of Non carrier high tensile strength copper foil. |
| 2012 | Electrodeposited copper foil for Li-Ion secondary battery is adopted by EV manufactures. |
| Mar.2004 | Reduced capital to 480 million yen |
| Dec.2002 | Fujieda plant and Tokyo office were closed and all function were moved to Shimodate plant. Stared sales of Electrodeposited copper foil for super fine FPC. |
| Jan.2002 | Headquarters was moved to Shimodate-shi, Ibaraki Prefecture. |
| 1999 | Started sales of Electrodeposited copper foil for EMS of PDP. |
| 1996 | Started sales of Electrodeposited copper foil for Li-Ion secondary battery |
| Apr.1993 | Shimodate plant and Shimodate 2nd plant were integrated. |
| Sep.1991 | Increased capital to 1,200 million yen |
| 1989 | Electrodeposited copper foil for IC package sales started. |
| Apr.1985 | Increased capital to 800 million yen |
| Oct.1984 | Shimodate 2nd plant operation started. |
| Mar.1984 | Shimodate 2nd plant construction started in Shimodate-shi, Ibaraki Prefecture. |
| Jan.1983 | Fujieda plant operation started. |
| Apr.1982 | New plant construction started in Fujieda-shi, Shizuoka Prefecture. |
| Nov.1980 | Increased capital to 400 million yen |
| Mar.1973 | Increased capital to 200 million yen |
| Jun.1970 | Increased capital to 150 million yen |
| May.1965 | Headquarters was moved to Tokyo |
| Sep.1964 | Received a loan for funds of updating equipment from Development Bank of Japan based on "the industrialization of new technology". |
| Apr.1963 | Shareholder changed from Hitachi, Ltd., to Hitachi Chemical Co., Ltd. |
| Aug.1962 | Increased capital to 100 million yen |
| Jul.1961 | New plant construction started in Shimodate-shi, Ibaraki Prefecture. Electrodeposited copper foil manufacturing equipment by batch process completion |
| Dec.1958 | Started Industrialization trial research of "Trail for electrodeposited copper foil for printed circuit in serial process". |
| Oct.1958 | Nippon Denkai, Ltd. was founded in Kyoto with capital of 15 million yen, by three corporations which were Hitachi, Ltd., Sumitomo Bakelite Co., Ltd., and Kosoku Denki Chuzo Co., Ltd. |