Berthier Associates: Designs workplaces, lounges, showrooms, and labs.
Chiyoda Corporation: Offers international engineering, design and construction services. Corporate information and news, and technical articles. Content available in English and Japanese.
Chodai Co., Ltd.: Civil engineering company specializing in the planning, design, and construction supervision of long span bridges, infrastructure, and computer systems.
Dai-Dan: Specializing in electrical works.
Daito Trust Construction: Planning and construction of buildings, and buildings management.
E-Markets Co.: Japanese construction machinery and heavy equipment exporters. Ships worldwide.
Fudo Construction: Civil engineering for offices and government buildings.
Fujita Corporation: Construction company involved in building planning, design, maintenance, urban renewal, and environmental technology.
Hagiwara House Corporation: Construction company providing renovation services.
Hazama Corporation: Active in construction, including large-scale public works projects. Also involved in architecture work and civil engineering.
Hitachi Construction Machinery: Provides a variety of equipment and attachments for construction, including digging, loading, carrying, breaking, grabbing, cutting, crushing, and screening.
Hitachi Plant Technologies: Construction of power plants, water treatment facilities, and clean rooms.
Ilya Corporation: Design of commercial and corporate office interiors.
Jgc: Active in construction of nuclear and chemical plants.
Kajima Corporation: Civil engineering projects, such as nuclear power plants.
Kandenko: Construction contractor providing electric facility installations.
Kaneso Co.,Ltd.: Manufactures and sells metal products for architecture, buildings, and conduits. With introduction of products, statement of accounts, employment, and download of CAD data.
Kidoh Construction: Osaba based construction company of pre-stressed concrete tanks and bridges.
Koatsu Kogyo: production and sale of pre-stressed concrete products.
Komatsu, Ltd.: Makes loaders, tracked excavators, shovels, dozers, carriers, motor graders, dump trucks, and tunnelers, plus mining, electronics, industrial, environmental products, and their component parts.
Maeda Corporation: Large civil engineering projects.
Meisei Industrial: Architectural construction and interior finishing.
Mesco: Construction of facilities and industrial equipment.
MH Development: Specializes in heavy-steel modular and mobile buildings. Manufactures and ships overseas.
Nittoc Construction: Construction company offering civil engineering works, roads and sewerage.
Ohki: Provides architectural construction.
Oriental Construction: Construction of pre-stressed concrete buildings.
P.S. Mitsubishi Construction: Active in the construction of buildings and roads.
Penta-Ocean Construction: Development of railroads and sewer systems.
Sekisui House Ltd.: Osaka firm focusing on design and construction of buildings and landscape, civil engineering, real estate, interior decoration, trucking and warehousing.
Seltec Inc.: Offers concrete engineering, landscaping specialties, urban materials design and applications, soil stabilization, and house foundation reinforcement.
Shimizu Corporation: Construction and real estate development.
Shiraishi: Architectural construction of bridges and roadways.
SOGO Corporation: A specialist trading company in Japan for the exporting used construction machinery. With current stock list.
Suruga: General contractor for commercial buildings.
Taikisha: Designs and installs cleanroom systems, mechanical and electrical systems for buildings, paint finishing systems, and the manufacture and sale of related materials and equipment.
Taisei Corporation: Construction of office buildings and electric power facilities.
Takenaka Corporation: Active in architecture, engineering, construction, interior design, urban development, and recycling.
Tateyama Aluminum Industry Co., Ltd.: Based in Takaoka City, Toyama. Maker of business construction materials, housing fixtures, signs, commercial and public facilities.
Token Corporation: Active in construction, housing, tenancy arrangements, renovations, architecture design, building, travel, and financial services.
Tokura Construction Co., Ltd.: Active in civil engineering and buildings, power plants, dams, and water channels. Based in Nagoya.
Toyo Engineering: Includes research, consulting and construction of chemical facilities, nuclear power, natural gas, oil refining, and biotechnology. Based in Chiba.
Zenitaka Corporation: Urban and marine development, real estate, and civil engineering. Based in Osaka with international offices.