Hitachi Plant Technologies
- Construction of power plants, water treatment facilities, and clean rooms.
- http://www.hitachi-pt.co.jp/

Zenitaka Corporation
- Urban and marine development, real estate, and civil engineering. Based in Osaka with international offices.
- http://www.zenitaka.co.jp/

SOGO Corporation
- A specialist trading company in Japan for the exporting used construction machinery. With current stock list.
- http://www.sogocorporation.com/

Seltec Inc.
- Offers concrete engineering, landscaping specialties, urban materials design and applications, soil stabilization, and house foundation reinforcement.
- http://www.seltec.co.jp/

E-Markets Co.
- Japanese construction machinery and heavy equipment exporters. Ships worldwide.
- http://www.emarkets.co.jp/

Hazama Corporation
- Active in construction, including large-scale public works projects. Also involved in architecture work and civil engineering.
- http://www.hazama.co.jp/

Hitachi Construction Machinery
- Provides a variety of equipment and attachments for construction, including digging, loading, carrying, breaking, grabbing, cutting, crushing, and screening.
- http://www.hitachi-c-m.com/

Jgc
- Active in construction of nuclear and chemical plants.
- http://www.jgc.co.jp/

Shiraishi
- Architectural construction of bridges and roadways.
- http://www.shiraishi.com/english/

Oriental Construction
- Construction of pre-stressed concrete buildings.
- http://www.oriken.co.jp/

P.S. Mitsubishi Construction
- Active in the construction of buildings and roads.
- http://www.psmic.co.jp/ps_english/

Chiyoda Corporation
- Offers international engineering, design and construction services. Corporate information and news, and technical articles. Content available in English and Japanese.
- http://www.chiyoda-corp.com/

Tokura Construction Co., Ltd.
- Active in civil engineering and buildings, power plants, dams, and water channels. Based in Nagoya.
- http://www.tokura.jp/english/

Takenaka Corporation
- Active in architecture, engineering, construction, interior design, urban development, and recycling.
- http://www.takenaka.co.jp/takenaka_e/

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.
- http://ww2.kaneso.co.jp/

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.
- http://www.komatsu.com/

Token Corporation
- Active in construction, housing, tenancy arrangements, renovations, architecture design, building, travel, and financial services.
- http://www.token.co.jp/about_token/company_e/index.html

Berthier Associates
- Designs workplaces, lounges, showrooms, and labs.
- http://www.berthier.co.jp/

MH Development
- Specializes in heavy-steel modular and mobile buildings. Manufactures and ships overseas.
- http://www.mhd.co.jp/en/index.htm

Kidoh Construction
- Osaba based construction company of pre-stressed concrete tanks and bridges.
- http://www.kidoh.co.jp/english/e_index.htm

Toyo Engineering
- Includes research, consulting and construction of chemical facilities, nuclear power, natural gas, oil refining, and biotechnology. Based in Chiba.
- http://www.toyo-eng.co.jp/e/

Hagiwara House Corporation
- Construction company providing renovation services.
- http://www.hagiwara-k.com/

Dai-Dan
- Specializing in electrical works.
- http://www.daidan.co.jp/english/english/

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.
- http://www.taikisha.co.jp/e-cont.htm

Meisei Industrial
- Architectural construction and interior finishing.
- http://www.meisei-kogyo.co.jp/TopPage_Eng.htm

Kandenko
- Construction contractor providing electric facility installations.
- http://www.kandenko.co.jp/

Nittoc Construction
- Construction company offering civil engineering works, roads and sewerage.
- http://www.nittoc.co.jp/e/

Sekisui House Ltd.
- Osaka firm focusing on design and construction of buildings and landscape, civil engineering, real estate, interior decoration, trucking and warehousing.
- http://www.sekisuihouse.co.jp/english/

Penta-Ocean Construction
- Development of railroads and sewer systems.
- http://www.penta-ocean.co.jp/english/

Suruga
- General contractor for commercial buildings.
- http://www.suruga.com/english/

Daito Trust Construction
- Planning and construction of buildings, and buildings management.
- http://www.kentaku.co.jp/e/

Ohki
- Provides architectural construction.
- http://www.ohki.co.jp/

Maeda Corporation
- Large civil engineering projects.
- http://www.maeda.co.jp/english/outline_e.html

Kajima Corporation
- Civil engineering projects, such as nuclear power plants.
- http://www.kajima.co.jp/welcome.html

Fujita Corporation
- Construction company involved in building planning, design, maintenance, urban renewal, and environmental technology.
- http://www.fujita.com/

Shimizu Corporation
- Construction and real estate development.
- http://www.shimz.co.jp/english/

Taisei Corporation
- Construction of office buildings and electric power facilities.
- http://www.taisei.co.jp/english/

Koatsu Kogyo
- production and sale of pre-stressed concrete products.
- http://www.koatsuind.co.jp/english/

Ilya Corporation
- Design of commercial and corporate office interiors.
- http://www.ilya.co.jp/en/index.html