Since our establishment in Nagasaki City in 1948, we have been operating as a company specializing in steel structures such as bridges / building steel frames, structures for power plants, and ship shells.

In 1958, we developed a strain correction device for welded H-section steel, and since then, we have delivered more than 1,000 manufacturing equipment related to welded section steel to major bridges, steel frame fabricators, and shipbuilding industries in Japan and overseas. We have achieved a high market share.

Japan's steel structure technology is at the top level in the world, and it is also one of the world's leading producers. It is our purpose to be able to contribute to society by continuing to make steel structures by ourselves, with the patronage of our highly-skilled bridge, steel frame, and shipbuilding expert companies.

We will continue to study further with our abundant sensibility and technical capabilities, with the aim of sincerity.