Ryobi Kiso Holdings Ltd. is an investment holding company. The Company operates through four segments: Bored piling; Eco-friendly piling, geoservices and others; System engineering and process automation, and Property investment. The Bored piling segment is engaged in piling work to carry heavy vertical loads from structures (such as buildings and bridges) and horizontal loads in earth retaining structures for deep excavation. The Eco-friendly piling, geoservices and others segment is engaged in eco-friendly and low pollution piling works. The System engineering and process automation segment is engaged in metal fabrication on truck body, work for liquid petroleum gas tanks, high pressure vessels, chemical tanks, aircrafts refillers and oil and gas refillers, installation of industrial machinery and equipment and mechanical engineering works. The Property investment segment is engaged in investment in and trading of and development of residential, commercial and industrial properties.