About us
 
Corporate history
1959March Toyokinzoku Co., Ltd. is established as the materials procurement division of Kitazawa Mfg. Co., Ltd. (currently Kitz Corporation).
1960April Brass bar factory is constructed inside Nagasaka factory of Kitazawa Mfg. Co., Ltd. and brass bar production starts.
1962March Hot-forging press for brass is introduced and manufacture and sale of forged brass valves start (first company in Japan to do so).
1964June Brass bar factory is constructed in Suwa and Nagasaka factory brass bar division is transferred.
1967June Vertical continuous casting machine and 1,650-ton extrusion press are introduced and mass production system is established.
1975April Current Chino factory is constructed in Chino, 3,200-ton extrusion press introduced, and large-scale mass production system established for valves and for supply to outside companies.
1977June Chino factory is authorized as a JIS-certified brass bar factory.
1978April Forging factory is completed and manufacture and sale of forged products start.
1980January Production sites are consolidated at Chino factory.
1985May Construction of baseball field on factory premises is completed and the field is opened to residents in the area.
1986March Horizontal continuous casting machine is introduced and casting productivity improvement efforts are implemented.
1990August Processed products factory is completed and manufacture and sale of cut and machined brass products start.
1991April Merger with Kitz Corporation is completed to form the company's new brass bar division.
1994February Dezincification-resistant brass bars with high corrosion resistance are developed and manufacture and sale of these products start.
1995May Becomes the first manufacturer of brass bars in Japan to acquire ISO 9002 certification.
1997October TZ high-strength dezincification-resistant brass bars are developed jointly with TOTO.
1999May KEEPALLOY environmentally friendly lead-free dezincification-resistant brass bars are developed and manufacture and sale of these products start.
2001February ISO 14001 certification is acquired.
2002June ISO 9001:2000 certification is acquired.
2004April Spun off from Kitz Corporation as the new company Kitz Metal Works Corporation.
October ICP analyzer is introduced and manufacture and sale of RoHS-compliant brass bars start.
2005May Brass bar business is purchased from former Kyoto Brass Co., Ltd. to form the new Kyoto Brass Co., Ltd.
2006July Kicho-shindo Co., Ltd.'s assets and Kicho brand are purchased and manufacture and sale of thin bars start.
August New forging factory is completed and forged product manufacturing and sales operations are strengthened.
2009July Merger with Kyoto Brass Co., Ltd. and production site consolidation are completed.
2010April ISO 9001: 2008 certification is acquired.
2013May KEEPALLOY Ⅱ environmentally friendly lead-free dezincification-resistant brass bars are developed and manufacture and sale of these products start.
2015July Acquired the stock of Hokutoh Giken Kogyo Corporation.
2016May Cut and machined process and forged process of brass in Kitz group is concentrated in new factory.
2019September Constructed a new factory. 3,500-ton extrusion press are introduced and mass production system is established.
November Concluded a licence agreement with Mitsubishi Shindoh Co., Ltd.(currently Mitsubishi Materials Corporation) for the silicon-based Lead-free brass bars "ECO BRASS®" series.