Kuwayama Corp. engages in the manufacture and sale of jewelry. It operates through the following business divisions: Ore Jewelry, Diamond Jewelry, and Others. The Ore Jewelry division manufactures and sells gold and platinum necklaces, rings, bracelets and earrings. The Diamond Jewelry division buys and sells diamonds in domestic and overseas markets. The Others division handles pearl related jewelries. The company was founded by Yukihiro Kuwayama in April 1964 and is headquartered in Tokyo, Japan.