August 1970	Established Teruo Yamauchi Design Office
January 1978	Changed corporate name to Yamauchi Design Office, Ltd. and registered incorporation
October 1980	Increased capital to ¥10,000,000
December 1980	Changed corporate name to Youth Engineering Co., Ltd.
May 1981	Started document production
December 1983	Started electronic machine and software development
May 1985	Increased capital to ¥15,000,000
October 1985	Completed head office
May 1986	Increased capital to ¥23,000,000
December 1986	Started machine equipment production
January 1988	Increased capital to ¥40,000,000
February 1990	Started electronic machine manufacturing
October 1992	Increased capital to ¥45,000,000
May 2001	Started manufacture and sale of automatic concentration apparatus
April 2003	Opened Matsuyama Office
November 2004	Opened Osaka Office
March 2005	Newly established Kuroshima Facility
April 2007	Acquired ISO9001 certification
September 2007	Established Towa Precision Machinery Equipment Co., Ltd.
September 2008	Established Tonglu Facility
April 2010	Opened Shanghai Representative Office
July 2010	Opened Yokohama Office
November 2010	Acquired ISO14001 certification
March 2011	Established Youth Trading Shanghai Co., Ltd.
April 2014	Selected in the GANBARU (Vibrant) Small and Medium Enterprises 300 (Ministry of Economy, Trade and Industry)
May 2014	Established Yushi Technology Co., Ltd. (Taiwan)
January 2015	Moved and Expanded Osaka Office
January 2017	Moved and Expanded Youth Trading Shanghai Co., Ltd.
May 2017	Opened Sendai Office
December 2017	Selected in The Driving Company for the Regional Future (Ministry of Economy, Trade and Industry)
April 2018	Newly established Kuroshima 2nd Facility
September 2019	Newly established Head Office Facility
December 2019	Moved and Expanded Yokohama Office