At Prime Sphere Trading LLC, we bring over 30 years of expertise in the steel wire industry. Headquartered in Tokyo and Shanghai, our wire and speaker manufacturing facilities supply not only Japan and China, but also extend to markets in South Korea, the United States, and beyond.

Our product portfolio covers a wide range of premium solutions, including carbon spring steel wire, phosphated steel wire, galvanized steel wire, smooth steel wire rope, galvanized steel wire rope, and stainless steel wire. With a strong commitment to quality, innovation, and global partnerships, we continue to deliver reliable products that meet the diverse needs of our international clients.