| October 1964 |
Established Taguma Kogyo Industries, Ltd. with a capital of 1.5 million yen. Keiichi Tanaka became CEO and Representative Director. |
| May 1972 |
Capital increased to 3 million yen. |
| December 1972 |
Construction industry. Obtained license from Yamaguchi prefectural governor. |
| June 1977 |
Capital increased to 6 million yen. |
| June 1978 |
Capital increased to 9 million yen. |
| June 1979 |
Capital increased to 12 million yen. |
| November 1980 |
Head office new building was completed. |
| September 1983 |
Obtained license for construction industry from Ministry of Construction. |
| December 1984 |
Hiroshima sales office was opened. |
| June 1986 |
Capital increased to 15 million yen. |
| April 1987 |
Corporate restructuring in Hiroshima and Shimane branch. |
| April 1987 |
Capital increased to 21 million yen. |
| June 1989 |
Capital increased to 25 million yen.
|
| July 1993 |
Capital increased to 27 million yen. |
| July 1994 |
Capital increased to 30 million yen. |
| October 1996 |
Fukuoka sales office was opened. |
| May 1998 |
Keiichi Tanaka took office as Chairman and Representative Director. |
| May 1998 |
Minoru Tanaka assumed the position as CEO and Representative Director. |
| April 2011 |
Fukuoka branch (Distribution division head office) was established. |
