| May 1934 |
The company is founded in Osaka City as Tokkyo Seihan Co., Ltd. |
| May 1937 |
Toyo Kohan Co., Ltd. acquires Kohan Kogyo Co., Ltd. |
| May 1946 |
Our name changes to Kohan Shoji Co., Ltd. The company specializes in processing and marketing iron and steel products made mainly with products and scrap from Toyo Kohan Co., Ltd. |
| September 1950 |
Our name changes to Kohan Kogyo Co., Ltd. after merging with Kansai Casting. |
| December 1965 |
Kohan Kogyo headquarters moves to Tokyo and establishes an Osaka branch. |
| January 1966 |
Kohan Kogyo establishes an office in Kudamatsu. |
| October 1976 |
Kohan Kogyo merges with Kohan Kiko and Tokyo Kiki and assumes the steel strap and machinery businesses from these companies. |
| July 1983 |
Our headquarters moves to Kudamatsu. The Tokyo and Osaka branchs are reorganized as sales offices. |
| August 1985 |
We open a precision machining works in Kudamatsu. |
| July 1993 |
The Tokyo and Osaka sales office are designated as branch offices. |
| April 1996 |
The precision machining works is reorganized into an electronics materials works and hard materials works. |
| September 1999 |
The machinery and electronics materials works acquire ISO 9001 certification. |
| 2004 |
The entire company acquires ISO 14001 certification. |
| April 2005 |
The hard materials works acquires ISO 9001 certification. |
| May 2005 |
The steel strap works acquires ISO 9001 certification. |
| April 2010 |
Toyo Kohan transfers the hard materials sales division to integrate manufacturing and sales. |
| April 2010 |
We establish a Nagoya sales group. |
| August 2010 |
The Nagoya sales group relocated. |
| April 2012 |
We establish a Kohan Kogyo Co., Ltd. Taiwan Liaison Office in Taichung city, Taiwan. |
| September 2012 | We establish Kohan Kogyo Korea Co., Ltd. in Seoul city, South Korea． |
| July 2016 | Kohan Kogyo Korea Co., Ltd. has moved its offices to Pusan, Korea. |
| September 2018 | We establish hard materials works, Mishima Office in Shizuoka prefecture. |
