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Kuni-Umi solar PV facility, Japan

Large-scale PV project in Japan

As part of Japan’s strategy to diversify its power generation capabilities, the US$1.1 billion Setouchi Kirei Mega Solar PV is being developed in a retired salt field near Setouchi City.

ClientSetouchi Kirei Future Creations
ExpertiseOwner's engineer


This project will provide a clean source of energy for Setouchi City.


As the owner’s engineer during the development phase of the project, we assessed plant performance and drafted plant test procedures, supported contract negotiations and advised on procurement. We supported the owner to optimise construction and operation costs prior to financial close and brought unique expertise to deploy international best practice for the first time, suitable to local conditions. We pioneered new approaches to improve accuracy of solar resource estimation in Japan and worked to gain lender and investor acceptance for such approaches.

We provided site management for the construction of the transmission line and the preparatory work for the plant itself, and supervised the quality of construction of a reinforced seawall embankment on the coastal side to prevent flooding. Inspections were carried out alongside a site management team to supervise the quality and programme of the sea wall and transmission line works.


The new power plant will be a clean source of energy for at least 20 years. There will be 192,000 tons of CO2 emissions cut, which is half of the city’s current emissions.

Drawing on our extensive global experience and local resources, we are supervising civil, electrical, structural and instrumentation system implementation work and reviewing detailed plant designs against local codes and international practice for solar PV projects.

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