DN Holdings Co.,Ltd. engages in the construction consulting and geological survey businesses in Japan. The company is involved in the design of bridges and road structures; and survey, design, and construction supervision, environmental impact reduction, and sustainable town development of compact plus network from the perspectives of road, town, and environment fields. It engages in the development of organizations capable of responding to intense natural disasters against the background of the increased awareness of environments in society; land suitability investigation where the suitability of strata for underground storage of CO2; and provision of ground investigation and analysis technology. DN Holdings Co.,Ltd. was founded in 1963 and is headquartered in Tokyo, Japan.