TBM JR Agatsuma Line Replacement Work on Yanba Tunnel TBM for pilot tunnel in Ultra-Large Cross-Section Urban NATM Tunnel Construction by Urban NATM under operating Railway Lines Railway Tunnel Constructed through Water-bearing Ground Pre-Lining & Face Reinforcement Method Tunnel New PLS (Pre-Lining Support) Large Section Tunnel in Unstable Ground Face reinforcement method with GFRP tubes Others Remote Charging Explosive System Bent Auger Foot-Pile Method Inclined Shaft of Underground Flood Control Reservoir By Pipe-Jacking

Naka Ochiai Shield Tunnel on Central Circular Route Large Variable Section Tunnel by MMST Method Compact Shield Method F-NAVI Coincident Segment Erection / Shield Driving System Mucking System using Pneumatic Dispatch Capsule for Vertical Shafts QB Segment

Development of Steel Pipe column construction method Road Tunnel Construction by Pneumatic Caisson method

Planned Shinkansen Lines Construction of Tunnels on New Tomei Expressway Metropolitan Expressway Network The Metropolitan Area Outer Discharge Channel Construction of Long-Distance Undersea Shield Tunnel Underground Liquefied Petroleum Gas Stock Base Underground Research Laboratories for R&D on HLW Connecting Adjacent dams for the purpose of effective water use Use of Deeper Underground Space in Urban Areas

Longest Tunnel Long Railway Tunnels in Japan (over 10 km meters in length - 2004/7) Long Roadway Tunnels in Japan (over 5000 meters in length - 2004/7) Trend of Construction Investment Activities on 2003.12.1

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