Chugai Mining Co., Ltd. engages in the metal, jewelry, and real estate businesses. It operates through the following segments: Precious Metal, Jewelry, Real Estate, Machinery, Investment, and Research and Development. The Precious Metal segment collects, refines, retails, and processes precious metals such as gold, silver, platinum, palladium. The Jewelry segment buys and sells diamonds and jewelries. The Real Estate segment engages in planning, development, sale, rental, and brokerage of condominiums and apartments. The Machinery segment purchases and sells used machine tools and sheet metal machines. The Investment segment deals with securities holding, trade, and investment. The Research and Development segment deals with renewable energy. It also engages in the planning, development, design, manufacture, wholesale, export and import of toys, play equipment and character goods. The company was founded on May 2, 1932 and is headquartered in Tokyo, Japan.