|May 1966||Saito Shoji established|
|Apr 1968||Mining Tool Sales Division established|
|Dec 1971||Product development resulted in the manufacture and sale of mining tools and equipment|
|Jan 1972||Saito Shoji was renamed to Hirado Kinzoku Kogyo|
|Oct 1974||The Fukuoka Plant was built to strengthen the Manufacturing Division|
|Jun 1976||The Yokohama sales office opened|
|Sep 1976||The manufacture and sale of hydraulic machinery began. New Rock splitter and attachments were developed.|
|Nov 1979||The Fukuoka Plant was expanded due to for our mining tools and equipment , aswell as our hydraulic greatly increased demano machinery.|
|Aug 1987||The new Fukuoka head office was built.|
|Apr 1990||The Fukushima office was opened.|
|Feb 1991||Hirado Trading Co. was established to strengthen the Trading Division.|
|May 1992||The offices at company headquarters were expanded.|
|Dec 1994||The Fukuoka plant was expanded to accommodate a mass production system. (painting and assembly facilities and can manufacturing facilities)|
|New offices were built for the Fukuoka plant|
|Jan 1996||Business agreements were signed with Boart Longyear and Unilock AB.|
|Mar 1997||177,700 square feet of land was purchased in Yoshii-machi, Fukuoka Prefecture, for the Yoshii plant.|
|Sep 1998||A new hydraulic pump model was developed.|
|Mar 2009||The Yoshii Pland was completed.
Production department was expanded, and products exhibition hall was newly established.
|May 2010||Sales department and Production department became independent affiliate companies.
Transformation to corporate group was progressed.
|Sep 2015||Incorporated Hirado Machinery Co., Ltd.
Integrating production management and unify business to improve efficiency.
|May 2016||Head office of Hirado Kinzoku Kogyo Co., Ltd. and its Fukuoka factory were integrated.|