Seiki Tokyu Kogyo Co., Ltd.

Founded Seiki Construction Industry Co., Ltd. in January 1950 (President: Masaki Seto), capital 1 million yen.

Established Seiki Construction Kogyo Co., Ltd. (President and Representative Director Masaaki Seto) - Capital of 1 million yen

Established Seiki Construction Kogyo Co., Ltd. (Masaaki Seto, President and Representative Director), with capitalization of ¥1 million

Established Century Construction Industry Co., Ltd. (President and CEO Masashi Seto) – Capital 1 million yen

Received first paving contract from the Ministry of Construction in October 1955.

Received first paving project order from the Ministry of Construction

Received order for first paving project from the Ministry of Construction

Received first paving contract from the Japan Road Corporation in November 1956.

Received first paving project order from the Japan Highway Public Corporation

Received order for first paving project from the Japan Highway Public Corporation

Changed company name from Seiki Construction Industry Co., Ltd. to Seiki Construction Co., Ltd. in April 1962.

Renamed company to Seiki Construction Co., Ltd.

Changed company name to Seiki Construction Co., Ltd.

Divided the road division of Tokyu Construction Co., Ltd. and established Tokyu Road Co., Ltd. in January 1967 (President: Kenzo Kondo), capital 30 million yen.

Separated Tokyu Construction Co., Ltd.'s road division and established Tokyu Road Co., Ltd. (President: Kenzo Kondo) – Capital: 300 million yen.

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

Listed Seiki Construction Co., Ltd. on the Second Section of the Tokyo Stock Exchange in September 1973. Capital 450 million yen.

Listed shares on the Second Section of the Tokyo Stock Exchange – Capital: 450 million yen.

Listed Seiki Construction Co., Ltd. on the Second Section of the Tokyo Stock Exchange. Capitalized ¥450 million

Merged Seiki Construction Co., Ltd. and Tokyu Road Co., Ltd. in May 1982 to form Tokyu Construction Industrial Co., Ltd. Became part of the Tokyu Group.

Merged Seiki Construction Co., Ltd. with Tokyu Road Co., Ltd., forming Seiki Tokyu Industrial Co., Ltd. as part of the Tokyu Group (President: Hideyuki Oshima).

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

Merged Seiki Construction Co., Ltd. with Tokyu Road Co., Ltd., forming Seiki Tokyu Industrial Co., Ltd. as part of the Tokyu Group (President: Hideyuki Oshima).

Listed on the First Section of the Tokyo Stock Exchange in November 1982.

Reclassified company shares to the First Section of the Tokyo Stock Exchange.

Changed listing of company stock to First Section of the Tokyo Stock Exchange

Increased capital to 10.9703 billion yen in March 1993.

Capital increased to 10.97 billion yen.

Capitalized ¥10,970,320,000

Received first performance-guaranteed paving contract from the Ministry of Land, Infrastructure, Transport and Tourism in March 1999.

Received first performance-based paving project order from the Ministry of Construction

Received order for the first performance-based type of paving project from the Ministry of Construction

Celebrated 50th anniversary in January 2001.

Celebrated the 50th anniversary of establishment.

Marked 50th anniversary of company’s founding

Received two paving contracts under the new comprehensive evaluation system of the Ministry of Land, Infrastructure, Transport and Tourism in March 2002.

Won two out of three contracts in the Ministry of Land, Infrastructure, Transport and Tourism's Comprehensive Evaluation Method Pavement Project No. 1.

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

Obtained ISO 14001 certification for all headquarters departments, four branches, and the Kanto sales office in October 2004.

Registered ISO 14001 certification (all headquarters departments and the Kanto region's four branches, Kanto Manufacturing and Sales Division).

Acquired ISO 14001 certification (all departments of head office, four branch offices and Kanto Product Sales & Marketing Branch Office in the Kanto region)

Increased capital to 1.19703 billion yen in August 2005.

Capital increased to 10.97 billion yen.

Capitalized ¥1,097,030,000

Capitalized ¥7,197,030,000

Capital increased to 7.19 billion yen.

Unified ISO 9001 certification for all headquarters and branch related departments in October 2005.

Unified ISO 9001 certification across the company (integrated registration for headquarters related departments and all 11 branches).

Unified ISO 9001 certification for entire company (Integrated certification for related departments of head office and all 11 branch offices)

Increased capital to 2 billion yen in March 2006.

Capital increased to 2 billion yen.

Capitalized ¥2 billion

Obtained ISO 14001 certification for all branches in September 2010.

Registered ISO 14001 certification (completed at all branches).

Acquired ISO 14001 certification (all branch offices)

Obtained ISO 45001 certification for all headquarters and branch departments in December 2018.

Registered ISO 45001 certification (all headquarters departments and all branches).

Acquired ISO 45001 certification (all departments of head office and all branch offices)

Celebrated 70th anniversary in January 2020.

Celebrated the 70th anniversary of establishment.

Marked 70th anniversary of company’s founding

Obtained ISO 55001 certification for the Construction and Technology divisions in March 2021.

ISO55001 certification registration (Headquarters Business Promotion Headquarters Construction Department, Technical Headquarters Technical Department)

Acquired ISO 55001 certification (Construction Department of Business Promotion Head Office and Technology Department of Technology Management Head Office)