| June 1951 |
Established Toshin Silk milling Co., Ltd. |
| October 1959 |
Started manufacturing aluminum electrolytic capacitor |
| October 1959 |
Company name changed to Toshin Kogyo Co., Ltd. |
| July 1962 |
Production of film capacitor started |
| April 1965 |
Started production of carbonic variable resistor |
| May 1973 |
Established Itakura Electronics Co., Ltd. |
| June 1985 |
Established Itoigawa TK Co., Ltd. |
| September 2002 |
Established Taiwan Toshin Kogyo |
| February 2003 |
Established Hengli Toshincon Electronics Factory (China) |
| March 2004 |
ISO-14001 certification acquired (Maruko office) |
| April 2004 |
ISO-9001 certification acquired (Itoigawa TK) |
| April 2004 |
Started sales of LCD modules |
| January 2009 |
Established Korea Toshin Kogyo Co.,Ltd |
| April 2012 |
Established Toshincon Electronics(H.K.) Co.,Ltd. |
| April 2015 |
Established Dongguan Kasahara Toshincon Electronics Co.,Ltd |
| September 2015 |
Conclusion of sales agreement with MUNDORF, sales started |
| November 2017 |
Established Dongguan Kasahara Toshincon Electronics Co.,Ltd |
| December 2017 |
Establishment Unit TK Co.,Ltd |
| December 2019 |
Merged with domestic production base Itoigawa TK Corporation |
