| 1974 After the retirement from the transformer manufacturer Minato Seiki Co., Ltd., Chosei Tsuruta founded his private company Tsuruta Electric and started the production of transformers. | |
| 1975 | 1975 Tsuruta Electric Co., Ltd. was established, and Chosei Tsuruta was installed as the President. |
| 1977 | The head office and main factory were constructed at Shimo-Ohno, Koga-shi. The production capacity was increased to the transformer up to 100KVA. |
| 1978 | Increased the factory and installed the Varnish Vacuum Impregnation Equipment. |
| 1979 | Increased the capital to JY 12 million. |
| 1983 | Started the production of Lightening Resistance Transformers. Increased the capital to JY 24 million |
| 1985 | Started the production of Noise Resistance Transformers. |
| 1996 | Obtained the qualification of the certified factory by TUEV Rheinland, and started the production of Transformers in compliance with IEC Safety Standards. |
| 1998 | Obtained the qualification of the certified factory by UL, and started the production of Transformers and Power Box in compliance with UL Standard. |
| 2000 | Chosei Tsuruta was installed as the Chairman, and Jun Tsuruta was installed as the President respectively. |
| 2004 | Established the 3rd Factory (600m2) for the production of Power Box. |
| 2007 | Increased the capital to JY 48 million. |
Tsuruta Electric
TSURUTA ELECTRIC CO.,LTD.