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 | 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.
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 | 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.
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 | Daito Trust Construction - Planning and construction of buildings, and buildings management.
|  | E-Markets Co. - Japanese construction machinery and heavy equipment exporters. Ships worldwide.
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 | Fudo Construction - Civil engineering for offices and government buildings.
|  | Fujita Corporation - Construction company involved in building planning, design, maintenance, urban renewal, and environmental technology.
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 | 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.
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 | 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.
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 | Ilya Corporation - Design of commercial and corporate office interiors.
|  | Jgc - Active in construction of nuclear and chemical plants.
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 | Kajima Corporation - Civil engineering projects, such as nuclear power plants.
|  | Kandenko - Construction contractor providing electric facility installations.
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 | 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.
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 | 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.
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 | Maeda Corporation - Large civil engineering projects.
|  | Meisei Industrial - Architectural construction and interior finishing.
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 | Mesco - Construction of facilities and industrial equipment.
|  | MH Development - Specializes in heavy-steel modular and mobile buildings. Manufactures and ships overseas.
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 | Nittoc Construction - Construction company offering civil engineering works, roads and sewerage.
|  | Ohki - Provides architectural construction.
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 | Oriental Construction - Construction of pre-stressed concrete buildings.
|  | Penta-Ocean Construction - Development of railroads and sewer systems.
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 | P.S. Mitsubishi Construction - Active in the construction of buildings and roads.
|  | Sekisui House Ltd. - Osaka firm focusing on design and construction of buildings and landscape, civil engineering, real estate, interior decoration, trucking and warehousing.
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