J-One Corporation is engaged in eco-friendly energy business and 
new and renewable power generation business.
We are proud to be a leader in the domestic materials market, 
supplying high-quality steel products.
Supplying various steel products such as plates, bars, section steels, 
and wire rods to major domestic and overseas customers.
Supplying core materials to major domestic industries such as 
shipbuilding, marine engineering, new energy, and automobiles
Establishing close cooperative relationships with excellent overseas 
manufacturers based on a global network