Daiken Co., Ltd. engages in the manufacture and sale of building materials and exterior metal products. It operates through the Construction-Related Products and Real Estate Leasing segments. The Construction-Related Products segment manufactures, sells, and installs architectural hardware such as hardware, metal fittings, door hangers, aluminum materials, and exterior building products. The Real Estate Leasing segment manages apartments and rental stores. The company was founded by Kyoichi Fujioka in April 1924 and is headquartered in Osaka, Japan.