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TONEZ Corporation

Heat treatment specialist

For over 110 years, we have been dedicated to heat treatment. Since our founding in 1909, we at TONEZ have pursued technology and quality specialized in the heat treatment of metals. Utilizing the technical skills we have honed over many years, we are proud to have earned a solid reputation across a wide range of fields, from automotive parts to precision small components, large materials measuring up to several meters in length and weighing dozens of tons, and even highly precise aerospace equipment parts. In terms of quality, we have obtained "ISO 9001" and "JIS Q 9100" certifications, establishing a world-class quality management system.