DT provides services related to planning, design, construction, engineering, operation and maintenance support, consulting and business support related to various railways and contributes to the construction of the national public infrastructure.
Top priority is to achieve thorough construction quality and secure organic interface between systems related to construction.

We systematically manage the specialists who are used to carry out construction work.

We aim to manage construction to prevent the loss of lives and customers' property by using proven know-how, and secure cost reduction and post-construction maintenance efficiency by using techniques such as construction quality management and process management.

We carry out to reduce risks that meet customer needs by identifying and removing risks that may occur during construction.