ISHIGAKI SHOUTEN Inc. has been providing high-quality copper components to the electric power equipment industry, including transformer and control panel manufacturers, as a copper processing specialist since we were established in 1948. Our technological capabilities stem from our many years of dealing with copper, while we have problem-solving skills thanks to our integrated production system and multi-skilled employees. We aspire to fulfill a diverse array of customer requirements as a comprehensive one-stop solution, while also playing a vital role in advancing a low-carbon energy infrastructure through leveraging the exceptional energy transmission properties of copper to their fullest extent.


Copper and other nonferrous metal processing Copper has high thermal and electrical conductivity and is energy efficient. We handle a variety of copper materials, from a single prototype to mass production of several thousand pieces. We can process plates from 0.2 mm to 30 mm in thickness and up to 3,000 mm in length, and round workpieces from 6 mm to 120 mm in diameter and up to 1,500 mm in total length.

Characteristics of copper processing SHIGAKI SHOUTEN Inc. has been processing nonferrous metals like copper, brass, and aluminum for around 70 years. We can complete a wide range of processing in-house, which includes not only cutting and lathing, but also bending, pressing, and thread rolling. Our copper processing boasts advanced characteristics.

Bend and press processing
Bend processing is possible from thin sheets of t=1.0 mm to thick sheets of t=25 mm. Special kinds of processing includes edgewise bending and processing of 3,000 mm long items. In addition to dimensional accuracy, we can also provide a high-quality finish for parts in cases where there must be no burrs or flaws in the finished product.

Cutting and lathe processing
We have a variety of equipment including NC lathes, compound lathes, and vertical machining centers, and can handle not only mass production, but also high-mix small-lot production, in addition to prototype manufacturing from a single item. We have experience in one-chucking processing of high-precision parts on a compound lathe and machining of small-sized square objects (10 x 10 mm).


Thread rolling
We utilize our own thread rolling machines to perform metric thread cutting and knurling. Based on the customer's needs, we select the best method of lathe turning or form rolling. Preparing various types of dies enables shorter delivery time improved productivity.


Why we can offer solutions Our strength lies in our ability to offer solutions like shorter delivery times and cost reductions. Because we have worked together with our customers as a company specializing in copper, brass, and aluminum processing, we can offer solutions through thoughtful efforts.

Integrated Production
We offer integrated production services from a single item. managing everything from material procurement to brazing, annealing, and a range of surface treatments. With our extensive in-house facilities and unique network, we excel in diverse processes such as plating and welding. Furthermore, we guarantee excellent quality through incoming and pre-shipment inspections, ensuring our valued customers receive only the best products.

Quick delivery
Our one-stop delivery from material procurement to delivery ensures quick turnaround times. With copper bars and round bars kept in stock, we can achieve quick delivery with a significant reduction in the lead time required to arrange materials in an emergency. We have a wide range of materials from general copper materials to materials with special characteristics, like beryllium copper. In cases where we have the materials at hand, our delivery record is as short as one day. Even for materials that are out of stock, we can quickly procure them using the network we built up when we were wholesalers, so we can then perform integrated production.

Efforts and third-party certifications Copper has high thermal conductivity and high electrical conductivity. We manufacture electric power and thermal energy components that make the best use of these characteristics. By doing so, we contribute to the realization of a carbon-neutral society and lend our support to companies that champion energy conservation and strive for low carbon emissions, particularly in the electric power equipment industry.
In 2022, we were certified as an "Aichi Biodiversity Company" in recognition of our efforts including local cleanups and conservation of rare plant species in wetlands through industry-academia collaboration. As of 2024, we are currently in the process of establishing a corporate structure to implement an environmental management system.