Eight-Japan Engineering Consultants Inc. provides infrastructure solution consultancy services in Japan and internationally. The company offers infrastructure construction, maintenance, and management support services in the areas of roads and transport; rivers and ports; urban and regional planning and environment; infrastructure maintenance and support; earthquake resistance, disaster prevention, and information; recycling and energy; geology and geotechnical engineering; and surveying, compensation, and architecture. It also provides management services, such as public facility management; feasibility studies, design, work supervision, and monitoring related to the introduction of PPP or PFI; diagnosis of the applicability of all-inclusive entrustment; advice on the entrustment of operations; planning for the life span prolongment of housing; support for owners (specifications, required standards, and others); study on project management methods; and operation and management of public facilities. Eight-Japan Engineering Consultants Inc. was formerly known as Eight Consultants Co., Ltd. and changed its name to Eight-Japan Engineering Consultants Inc. in June 2009.

The company was founded in 1955 and is based in Okayama City, Japan with an international headquarters in Tokyo, Japan. Eight-Japan Engineering Consultants Inc. operates as a subsidiary of E J Holdings Inc.