| 1946.5 |
The Minato Denki Shokai was founded in Hamamachi, Yokkaichi-shi, Mie |
| 1949.2 |
Renamed Senko Denki Shokai Co., Ltd. |
| 1954.9 |
Founded Kita-Mie National Co., Ltd. |
| 1972.7 |
Tied-up a business with Maeda Electricity, Co., Ltd. |
| 1975.8 |
Tied-up a business with IWATA Denzai Co., Ltd. |
| 1976.2 |
Completed Headquaters' New Building in Kitahama-cho, Yokkaichi-shi, Mie |
| 1983.11 |
Founded SENKO Sangyo Co., Ltd. |
| 1984.3 |
Founded Chubu Senko Denki Co., Ltd. and Kanto Senko Denki Shokai Co., Ltd. |
| 1988.3 |
Moved Chubu's Headquarters to Kanayama-cho, Atsuta-ku, Nagoya |
| 1990.3 |
Renamed Senko Denki, Co., Ltd., and Chubu Senko Denki Co., Ltd., and Kanto Senko Denki Co., Ltd. |
| 1990.4 |
Founded Taiwan Senko Co., Ltd., Taipei, Taiwan |
| 1990.7 |
Founded Gifu Senko Denki Co., Ltd. |
| 2004.4 |
Founded Nesco Co., Ltd. |
| 2005.2 |
Founded Shanghai Senko Denki Co., Ltd., Shanghai, China |
| 2005.10 |
Founded Senko Mid East FZCO, Dubai, United Arab Emirates |
| 2010.3 |
Senko Denki Co., Ltd.merged with Chubu Senko Denki Co., Ltd., Gifu Senko Denki Co., Ltd., and Kanto Senko Denki Co., Ltd. |
