Our History


Yamato Gokin was established in 1941 as a special metals laboratory in Itabashi-ku, Tokyo, Japan. Its founder and president, Dr. Shigeru Hagino, started this company for research and development as well as for manufacturing high-strength and fine-grain alloys (YG bronze) to meet assorted requirements in vital machine parts for various industries such as automobiles, aircraft, and shipbuilding. These alloys became known for their high quality and superior performance, and consumer demand increased rapidly.

This laboratory was reorganized into Yamato Gokin (Alloy) Ltd. in April, 1943, for production of mostly government supplies. Machine parts made from these special, strong alloys were supplied to the Army, Navy and Air Force with remarkable results.

This company was dissolved in 1945 when the Second World War ended; however, it was started again with the same name, Yamato Gokin, in 1953 to meet the post-war industrial demands of Japan. Using newer technologies based on our many years of experience, we manufactured special-alloy materials for important parts of automobiles and trains as well as individual components of many different kinds of manufacturing equipment.

In the post-war era, Yamato Gokin developed special alloys such as YG alloys, SY alloys and YMB alloys, as well as copper chromium and copper beryllium. In addition to special aluminum, the company also developed various bronzes, and Yamato Gokin soon gained a widespread reputation as a special- copper-alloy manufacturer, earning the trust and support of a broad range of customers.

In the 1940’s, Dr. Hagino was employed by Mitsubishi Steel Manufacturing, where he was in charge of research into bronze products for the government. Therefore, Yamato Gokin has over 70 years of experience as a special-purpose-alloy producer in Japan.

Throughout our history, our main customers have included:
Ishikawajima-Harima Heavy Industries, Ltd.
ITOCHU Non-Ferrous Materials Co., Ltd.
ANA Nagasaki Engineering Co., Ltd.
KAMOME Propeller, Ltd.
Kyocera Kinseki, Ltd.
Komatsu. Ltd.
Sakata Kyodo Power Company, Ltd.
Sato Metal,Ltd.
Nippon Steel Corporation.
Mitsubishi Kakoki Kaisha, Ltd.
Mitsubishi Heavy Industries
Mitsubishi Material, Ltd.
Sumitomo Chemical Co., Ltd.
NGK Insulators, Ltd.
NEC Corporation
Hitachi, Ltd.
Yazaki Industries
Universal Shipbuilding Corporation

And, roughly 400+ other companies.

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