About the result of additional survey in Chofu city area (east side area of Iruma River)

Thank you for your continued understanding and cooperation in the Tokyo Outer Ring Road Project.
In the vicinity of Higashitsutsujigaoka 2-chome, Chofu City, depressions in the ground surface and cavities in the ground have been confirmed, causing concern and inconvenience to everyone living along the outer ring road.

In the area on the east side of the Iruma River, we have been conducting ground surveys such as cavities under the road surface and microtremor array surveys in response to the voices of residents.
This time, Chofu City and Chofu City Council have requested that the ground be investigated and promptly announced in order to alleviate the anxiety of the area. It was conducted.

The results of this survey have been confirmed in advance with each member of the "Tokyo Gaikan Tunnel Construction Review Committee, Expert Committee".
Going forward, we will continue to work as a company with the highest priority on relieving the anxieties of the residents, and will make sincere efforts to restore trust.

• Survey results (summary version) [PDF: 2.9MB]
• Survey results (main part) [PDF: 10.5MB]
• Survey results (reference materials) [PDF: 9.3MB]