Yamakin, a manufacturer of flat copper, brass, aluminum, and zinc wire and horizontal winding electric wire.

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last updated：Apr 21, 2026

ヤマキン本社

Supports various types, small quantities, and short delivery times! We have a proven track record of deliveries to major companies such as Mitsubishi Electric, Toshiba, and Sumitomo Heavy Industries!

Yamakin started as a non-ferrous metal sales business in 1916 and has since developed into a manufacturer of flat copper, brass, aluminum, and zinc wire and coiled wire. To accommodate a variety of products in small quantities with short delivery times, we change our production line six to seven times a day at peak times. Since the dimensions of materials change with temperature fluctuations, temperature management of the rolling mill is a crucial factor. Additionally, the rolling mill was a machine purchased by our predecessor in the United States, which means that all our wire products are manufactured through rolling. We are the only company in Japan that manufactures exclusively through rolling, giving us an advantage in offering a variety of products in small quantities with short delivery times. The introduction of the industry's first continuous patch system has reduced lead times to one-third to one-fourth. This has further accelerated our differentiation from competitors in terms of short delivery times. In the future, we will shift our focus from copper wire to aluminum wire, which has raw material costs less than half that of copper. Although aluminum has a conductivity that is 62% that of copper, we will address this by increasing the wire diameter. Since the rolling mill introduced by our predecessor was designed for aluminum, we possess significant know-how in aluminum wire production, and the rising prices of copper have also boosted demand.

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【Corporate Philosophy】 ■ A flexible structure that adapts to diverse, small quantities, and short delivery times ■ High quality comparable to large corporations ■ Unbeatable low costs ■ Enhanced information and technical capabilities to quickly meet user needs

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Applications/Examples of results

**Main Customers** Aikei Electric Co., Ltd. Aichi Electric Co., Ltd. Asahi Fastener Co., Ltd. Okawa Electric Trading Co., Ltd. OKB Corporation Osaka Electric Industrial Co., Ltd. Kyoden Cut Core Manufacturing Co., Ltd. Kobe Electric Industry Co., Ltd. San-ei Electronic Industry Co., Ltd. San M Package Co., Ltd. Shimane Electric Co., Ltd. Sumitomo Heavy Industries, Ltd. Daiichi Rare Metals Chemical Industry Co., Ltd. Taisei Engineering Co., Ltd. Daihen Taiyo Seiko Co., Ltd. Electric Meter Co., Ltd. Denki Seiko Co., Ltd. Toshiba Industrial Equipment Systems Corporation Toshiba Fuchu Factory Tokuden Co., Ltd. Toyo Electric Co., Ltd. Toyo Electric Manufacturing Co., Ltd. Towa Electric Industry Co., Ltd. Torishima Electric Manufacturing Co., Ltd. Nastoa Welding Technology Co., Ltd. Nikkatsu Electric Wire Manufacturing Co., Ltd. Nippo Electric Wire Co., Ltd. Japan Crimp Terminal Manufacturing Co., Ltd. Japan Hurex Co., Ltd. Japan Magnetics Co., Ltd. Nunome Electric Co., Ltd. Panasonic Welding Systems Co., Ltd. Kuno Electric Manufacturing Co., Ltd. Hitachi Industrial Equipment Systems Co., Ltd. Fine Nex Co., Ltd. Fukui Bolt Co., Ltd. Hokuriku Electric Manufacturing Co., Ltd. Mazda Martec Co., Ltd. Maruichi Steel Pipe Co., Ltd. Mitani Trading Co., Ltd. Mitsubishi Electric Corporation Itami Manufacturing Co., Ltd. Mitsubishi Electric Corporation Nagoya Manufacturing Plant Mitsubishi Electric Corporation Himeji Manufacturing Plant Mitsubishi Cable Industries, Ltd. UACJ Corporation Yoshimi Trading Co., Ltd.