Our company was founded as Shinohara & Co., in 1924, a time of chaos following the 1923 Great Kanto Earthquake, in light of the projected future building construction rush and the future heating equipment that would be essential for these buildings. In December 1929, we became a joint-stock company and changed our name to DAIICHI KOGYO CO., LTD. In 1947, we established the Conveyor System Division with the opportunity of construction of a conveyor system for the Tokyo Central Post Office, which had adopted automatic loading equipment. This built the foundations to become the air conditioning/plumbing and sanitary/conveyor systems company we are today.

1924	Founded Shinohara & Co. (at 5-chome Ginza Chuo-ku, Tokyo (then Uneme-cho, Kyobashi-ku, Tokyo)).
1929	Became a joint-stock organization (capital 125,000 yen), changed name to DAIICHI KOGYO CO., LTD., relocated to Marunouchi, and appointed Shiro Shinohara the first President.
1931	Obtained registration as Tokyo Waterworks Designated Construction Office (Designation No. 37).
1947	Established Conveyor System Division (Became Conveyor System Main Office in 1995).
1949	Obtained registration as a Construction Business Operator under implementation of the Construction Business Act (Issued by Minister of Construction (i) No. 855).
1962	Constructed Chuo Research Center (Warabi City, Saitama Prefecture).
1963	Received award at 1st Society of Heating, Air Conditioning and Sanitary Engineers of Japan Awards (for design and construction of air conditioning construction at Honda Technology Research Center).
1965	Obtained re-registration as Tokyo Waterworks Designated Construction Office (Designation No. 3).
1974	Construction Business Law was revised (License issued by Minister of Construction (General/Special 49) No. 4510).
1976	Opened Tokyo Branch Office (Became Tokyo Main Office in 1984).
1982	Obtained registration as Solar System Qualified Construction Business Contractor.
1986	Tokyo Main Office established 1.8 million hours accident-free record and received Accident-Free Record Certificate (Class-1) from Director of Tokyo Labor Standards Bureau of the Ministry of Labour.
1988	Conveyor Systems Division received Invention Achievement Award from the Japan Society for the Advancement of Inventions.
2000	Acquired ISO 9001 certification for all branches (from Japan Management Association Quality Assurance Registration Center).
2002	Tadao Shinohara was appointed Representative Director and President.
2006	Received award at 15th BELCA Awards (Best Reform Department; for Akamon General Research Building, Tokyo University (Bunkyo-ku, Tokyo)). Received award at 44th Society of Heating, Air Conditioning and Sanitary Engineers of Japan Awards (for construction of air conditioning system at Shinagawa Mitsubishi Building). Acquired ISO 14001 certification for all branches in Greater Tokyo area (from Japan Management Association Quality Assurance Registration Center; certification period terminated in April 2018).
2008	Received award at 46th Society of Heating, Air Conditioning and Sanitary Engineers of Japan Awards (for construction of air conditioning system for the Meiji Yasuda Life Insurance Building Redevelopment, 2011).
2011	Acquired Architectural and Construction Business License (Issued by Minister of Land, Infrastructure, Transport and Tourism (General 23)).
2012	Established local subsidiary in India (DAIICHI KOGYO INDIA Private Limited).
2013	Acquired Electrical Contracting Business License (Issued by Minister of Land, Infrastructure, Transport and Tourism (General 25)).
2015	Class-1 Architects Office (Issued by Governor of Tokyo No. 60286); Registered Electrical Contracting Business Operator (Issued by Governor of Tokyo No. 279727).