Developing technologies solely for aluminum.


Company website

1-2-45 Sawazu-cho, Niihama, Ehime 792-0862

TEL (0897) 37-0154 FAX (0897) 32-7118

Certified products and technology
Aluminum structures (including bending and welding technology), proposing manufacture through to on-site construction of bus bars

The predecessor of TAGUCHI INDUSTRIES, TAGUCHI INDUSTRY AND WELDING, was founded in 1943 as a contractor for Sumitomo Chemical, with the company’s name changed in 1951. At the start the main line of work was plant construction, however from the late 1950s, President Yoshimasa Taguchi expressed his desire to take a different approach to other companies, and the company began using imported welders that were made in America, which were extremely rare at the time. The company aimed to differentiate itself from others with aluminum welding technology that required special equipment and skills. In the half century since, TAGUCHI INDUSTRIES has always sought to fine-tune its aluminum welding technology. TAGUCHI INDUSTRIES has a full range of production equipment designed for aluminum welding such as aluminum welders, and today operates a comprehensive production system that covers the design through to installation of aluminum structures.


Work involving aluminum is the main business, which accounts for approximately 60% of all sales. One of those businesses is the production of aluminum structures, which covers a wide variety of applications, from amusement park equipment and promenades to airport parabolic antennas, inspection trucks for the Seto Ohashi bridge and aluminum silos. TAGUCHI INDUSTRIES requires that all staff be in possession of an aluminum welding license, and today 20 staff have the appropriate license. Each and every employee is an important member of the team for manufacturing high-quality products.

Another core line of products at TAGUCHI INDUSTRIES are conductors called bus bars. Bus bars are mainly installed in switchboards and control panels and used to distribute large electrical currents. According to TAGUCHI INDUSTRIES, approximately 70% of bus bars are made of highly conductive copper.


Aluminum bus bars do not have the same level of conductivity as copper, however the materials used are 1/3 to 1/4 the cost. Combined with the potential of much lighter aluminum, TAGUCHI INDUSTRIES is focusing efforts on proposing a change from copper bus bars to aluminum bus bars. The manufacturing process of aluminum bus bars calls for aluminum welding as well as extremely advanced bending techniques. Aligning numerous layers of thin aluminum sheets and then bending them requires the knowhow that TAGUCHI INDUSTRIES has developed over many decades. “The majority of light electrical manufacturers use copper bus bars, but we are pushing forward with the use of cheaper aluminum bus bars” explains Taguchi, as he outlines efforts to expand sales by marketing the company’s comprehensive production system capable of covering design through to on-site installation.


Taguchi is currently research the possibility of welding technology that can be used for both aluminum and copper. If this can be perfected, aluminum bus bars can be produced with copper electrodes which will increase conductivity and efficiency immensely over the current aluminum bus bars. While efforts are being made to research new technologies such as this, Taguchi remains committed to improving the company’s core technology - raising the level of aluminum welding techniques.

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