Benefiting from the advantages of excellent prestressed concrete (PC) techniques, ORIENTAL Construction has been actively participating in Japan's infrastructure projects as a leading builder in Japan's construction market since it was established in 1952.

Prestressed concrete is prestressed using high-strength steel as tendon to add extra strength so that it can bear a large load when used in civil engineering and architectural structures including bridges.
About 80% of the Company's sales derive from civil engineering projects, of which PC bridge construction amounts for 60%. More than 80% of sales relate to public works, because our major clients are national and local government offices, including Ministry of Construction, and public corporations such as Japan Highway Public Corporation.

Working with PC structures requires an extremely high level of expertise in stress calculation, tension control, and quality assurance. Therefore, the Company is equipped with many skilled design and construction engineers, while promoting development of new methods of construction, new technologies, and new products at its Technology Research Center with cutting-age facilities. Starting around 1955, the Company also promoted the use of PC for general architectural structures, in addition to bridges and other civil engineering works.

The Company ensures management stability through a balanced involvement in civil engineering and architectural businesses, recognizing that a slow economy tends to increase publicly financed civil works and a healthy economy boosts private demand for general architecture. In addition, the Company produces factory equipment, including crossties and curtain walls at its seven factories nationwide.

Head office address ORIKEN Hirakawacho Bldg. 1-1 Hirakawa-cho 2-chome, Chiyoda-ku, Tokyo
Establishment October 21, 1952
Capital 2,985.3 million yen (as of March 31, 2005)
Representative Teruaki Kakitsuka (president)
Workforcet 1,215 (as of March 31, 2005)
Listing Listed on the First Section of Tokyo Stock Exchange

ISO 9001 certification acquired: 1997: All facilities under the jurisdiction of Tokyo Branch (Hokkaido and Hokuriku Branches ,Kanto and Niigata Factories included) 1998: All facilities under the jurisdiction of Fukuoka Branch (Fukuoka Factory included) 1998: All facilities under the jurisdiction of Osaka Branch (Hiroshima and Shikoku Branches ,Shiga and Okayama Factories included) 1999: All facilities under the jurisdiction of Tohoku Branch (Tohoku Factories included) 1999: All facilities under the jurisdiction of Nagoya Branch

ISO 14001 certification acquired by all whole company.

Network Head office, Technical Research Center, 10 Branches, 7 Factories, and 43 sales offices
Businesses design, production, and selling of prestressed concrete products; and design, construction and administration for general civil engineering and architectural works
Licensed for or registered as Construction businesses by Ministry of Construction (No.4018)
First class architect office by the Governor of Tokyo (No. 1483)
Construction consultant by Ministry of Construction (No. 3761)
Building lots and buildings transaction business by the Governor of Tokyo (No. 43345)
  2006 ORIENTAL CONSTRUCTION Co.,Ltd. All Rights Reserved