相愛 Company Profile

We provide the optimal technology in the shortest time to ensure the safety and security of the people living there.

The business of Soai Co., Ltd. spans a wide range from geological surveys to regional consulting. Starting in 1956 as a geological survey company, Soai has engaged in various operations primarily in the civil engineering field, including water resource surveys, surveying, civil engineering design, and construction work, in response to the needs of the times. From investigating the natural environment, including geology, to creating regional plans that can coexist and develop with the environment, Soai aims to continue challenging itself with various operations and to propose a new circular lifestyle.