DNLtd. 

DN Holdings Co.,Ltd. provides general construction consultant services in Japan. It engages in the design of bridges and road structures; and research, design, and supervision of resilience, environmental impact reduction, and sustainable town development of compact plus network from the perspectives of road, town, and environment fields. The company is also involved 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. The company was founded in 1963 and is headquartered in Tokyo, Japan.