Tsubame-Sanjo is a city in Niigata Prefecture, Japan, known for its traditional metalworking industry. The city has a long history of metalworking, dating back to the Edo period (1603-1868), when it was a center of sword-making and other metal crafts. Over the years, the city has developed a strong reputation for producing high-quality metal products, including tableware, cutlery, kitchen tools, and more.

The reason for the outstanding quality of products from Tsubame-Sanjo is due to the combination of traditional techniques, passed down from generation to generation, with the latest technology and techniques. The metalworkers in Tsubame-Sanjo are highly skilled and dedicated to their craft, taking pride in producing products of the highest quality.