History
- January 1950
- Established Seiki Construction Kogyo Co., Ltd. (Masaaki Seto, President and Representative Director), with capitalization of ¥1 million
- October 1955
- Received order for first paving project from the Ministry of Construction
- November 1956
- Received order for first paving project from the Japan Highway Public Corporation
- April 1962
- Changed company name to Seiki Construction Co., Ltd.
- January 1967
- Split off Road Division of Tokyu Construction Co., Ltd., and established Tokyu Road Co., Ltd. (Kenzaburo Kondo, President and Representative Director) with capitalization of ¥30 million
- September 1973
- Listed Seiki Construction Co., Ltd. on the Second Section of the Tokyo Stock Exchange.
Capitalized ¥450 million
- May 1982
- Started operations as Seikitokyu Kogyo Co., Ltd., and as a member of the Tokyu Group, due to the merger of Seiki Constuction Co., Ltd. and Tokyu Road Co., Ltd., one of the Group’s original member.
- November 1982
- Changed listing of company stock to First Section of the Tokyo Stock Exchange
- March 1993
- Capitalized ¥10,970,320,000
- March 1999
- Received order for the first performance-based type of paving project from the Ministry of Construction
- January 2000
- Marked 50th anniversary of company’s founding
- March 2001
- Received order for two of the three paving projects from the Ministry of Land, Infrastructure, Transport and Tourism in the general-evaluation-based bidding method introduced for the first time by the Ministry.
- October 2004
- Acquired ISO 14001 certification (all departments of head office, four branch offices and Kanto Product Sales & Marketing Branch Office in the Kanto region)
- August 2005
- Capitalized ¥1,097,030,000
- September 2005
- Capitalized ¥7,197,030,000
- October 2005
- Unified ISO 9001 certification for entire company
(Integrated certification for related departments of head office and all 11 branch offices)
- March 2006
- Capitalized ¥2 billion
- September 2010
- Acquired ISO 14001 certification (all branch offices)
- December 2018
- Acquired ISO 45001 certification (all departments of head office and all branch offices)
- January 2020
- Marked 70th anniversary of company’s founding
- March 2021
- Acquired ISO 55001 certification (Construction Department of Business Promotion Head Office and Technology Department of Technology Management Head Office)
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