| February 1970 |
Company established in Aburadai, Akiruno-shi, Tokyo (Capital ￥3,060,000) |
| August 1973 |
Transistor tester development |
| May 1975 |
Began exporting overseas |
| February 1977 |
RAM checker development |
| May 1978 |
Established a new factory in Ushinuma, Akiruno-shi, Tokyo |
| October 1979 |
Monitor burn-in system development |
| September 1982 |
Established the Hakushu Factory in Hakushucho, Hokuto-shi, Yamanashi |
| March 1984 |
Aluminium migration system development |
| March 1985 |
Awarded Excellent Examination Company Tokyo Governor Prize |
| June 1987 |
Testing burn-in system development |
| March 1990 |
Received an award from the small and medium sied enterprize agency |
| April 1991 |
Established a new factory in Kominedai, Akiruno-shi, Tokyo |
| July 1996 |
Established 2nd Hakushu Factory |
| May 1998 |
Reached capital of ￥189,540,000 after several capital increases |
| December 2002 |
Acquired certification for Quality Management System (ISO9001:2000) |
| December 2004 |
Acquired certification for Environmental Management System (ISO14001:1996) |
| December 2005 |
Switched over to Environmental Management System 2004 version |
| December 2009 |
Switched over to Quality Management System 2008 version |
