Mitsubishi Kakoki Kaisha, Ltd. engages in the design, manufacture, installation, and sale of plant and environmental equipment. It operates through the Engineering and Machinery segments. The Engineering segment includes city gas and oil-related plants, chemical engineering plants, hydrogen generation plants, sewage treatment and industrial effluent treatment equipment. The Machinery segment includes oil purifiers, separators and filtration machinery, seawater screening facility, mixers and related products. The company was founded on May 1, 1935 and is headquartered in Kawasaki, Japan.