History

March 1955	Yakumo Sokuryo, the predecessor of Eight Consultants Co., Ltd., founded in Matsue, Shimane Prefecture
April 1959	Japan Engineering Consultants Co., Ltd. founded
October 2005	Capital and business alliance formed between Eight Consultants and Japan Engineering Consultants
June 2007	E∙J Holdings established through a joint share transfer between Eight Consultants and Japan Engineering Consultants (listed on the second section of the Tokyo Stock Exchange)
January 2008	Eight Consultants' subsidiary Shinkyo Engineering Consultants Co., Ltd. changed trade name to Japan Infrastructure Management Co., Ltd.
June 2009	Eight-Japan Engineering Consultants, Inc. established through a merger of Japan Engineering Consultants (splitting company) and Eight Consultants (succeeding company)
	Japan Engineering Consultants, Inc. changed trade name to EJ Business Partners Co., Ltd.
June 2010	Made Kindai-Sekkei Consultant, Inc. a wholly owned subsidiary
May 2015	EJ Business Partners absorbed by Eight-Japan Engineering Consultants
July 2018	Changed listing from the second section to the first section of the Tokyo Stock Exchange
March 2019	Made Ark Consultants Co., Ltd. a wholly owned subsidiary
July 2019	Made i DEVELOP CONSULTANTS Co., Ltd. a wholly owned subsidiary
November 2019	Made Futagami Architects & Associates a wholly owned subsidiary
	Made DAIMIC Co., Ltd. a wholly owned subsidiary
August 2020	Eight-Japan Engineering Consultants Inc. (currently a consolidated subsidiary) established a local subsidiary, EJEC (Thailand) Co., Ltd. (currently a consolidated subsidiary), in Thailand
September 2020	Shares of Toshi Kaihatsu Sekkei Corporation (currently a consolidated subsidiary) owned by Eight-Japan Engineering Consultants Inc. (currently a consolidated subsidiary) are succeeded to the Company by dividends in kind
April 2022	Transfered from the first section of the Tokyo Stock Exchange to the Prime Market of the Tokyo Stock Exchange