トンネル部 TUNNEL DETALLS
We create tunnels adapted to natural environment in cosideration of safety and economic efficiency by a cutting edge of technology and a broad experience.
構造・橋梁部 BRIDGE DETALLS
We provide a consistent proposals from planning, designing to a large variety of inspection, safety assessment for established structures, maintenance, reinforcement design.
交通技術部 TRANSPORT TECHNOLOGY DETALLS
Implement a large variety of transport infrastructure, comprehensive and multiple transportation planning including road traffic.
海外部門 INTERNATIONAL DETALLS
We contribute to the economic, social infrastructure development and welfare for developing countries with a focus on Official Development Assistance (ODA)