Obayashi Tunnel World

Obayashi Tunnel World

For over 100 years, Obayashi Corporation has engaged in tunnel construction, gaining various experiences and achievements from our worldwide projects.
Tunnel construction includes "Tunnels", which are constructed by excavating the ground while maintaining the interior space, and "Shield Tunnels", in which shield machines are used for the excavation and assembly of segments.
Integrating AI, ICT, robotics, automation and other cutting-edge technologies into our expertise, we aim to establish new era tunnel construction, with improved productivity and practical use of the new technologies.

Conventional Tunneling

OTISM® for automated and remote construction

A tunnel integrated system to dramatically improve safety, quality, and productivity of tunnel construction

Shield Tunneling

OGENTS®︎: The challenge for automated shield construction

A system that integrates and automates six types of work processes in shield construction to save labor and improve quality

Introduction of cutting-edge technologies

Conventional Tunneling cutting-edge technologies

In the more than 100 years of Obayashi’s engagement in tunnel construction, and 50 years since the NATM (New Austrian Tunneling Method) was introduced in Japan ---- over those years, tunnel technology has improved dramatically.

Conventional Tunneling

Shield Tunneling cutting-edge technologies

This page introduces Obayashi Corporation’s cutting-edge technologies of shield tunnels. With more than 600 achievements in Japan and abroad, we engage in research and development of new methods by integrating the latest technologies.

Shield Tunneling

Challenging projects,
and construction using cutting-edge technologies

Let us introduce you to some of our most challenging projects in Japan.

Conventional Tunneling

Challenging project ① Japan's first water-sealed underground LPG storage tank Namikata National LPG Stockpiling Base

Conventional Tunneling

Challenging project ② Excavation of extremely squeezing ground with the multiple layer support method Hokuriku Shinkansen Iiyama Tunnel
(Itakura construction section)

Conventional Tunneling

Challenging project ③ Tunnel construction in unconsolidated ground with high groundwater, directly under dense residential areas Construction of Kobe Nagata Tunnel

Shield Tunneling

Projects using cutting-edge technologies① Make up the mind, contemplate, and complete the project with solidarity. Yokohama Circular Northern Route project, bifurcation sections

Shield Tunneling

Projects using cutting-edge technologies② New attempt that attracts global attention through unity Central Circular Shinagawa Route Oi Area Tunnel Project

Shield Tunneling

Projects using cutting-edge technologies③ Working together as a team to overcome challenges Nakama Station (tentative name) of Subway Nanakuma Line, Fukuoka City West Section Construction Work

Tunnel Construction Professionals

Messages from Obayashi engineers at the forefront of the latest construction sites

Tunnel Construction Professionals

All about tunnels: history, methods and fun facts

Learn more about tunnels that are indispensable to our lives!

NEWS