The Infrastructure Management Portal is a dedicated site for the Prefecture of Yamaguchi to publish open data.

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Basic information for tunnel inspection report _Yamaguchi prefecture (Hofu Civil Engineering and Architecture Office)

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This is basic information for tunnels managed by Yamaguchi Prefecture.

Dataset information
Title	Basic information for tunnel inspection report _Yamaguchi prefecture (Hofu Civil Engineering and Architecture Office)
Organization	Road Maintenance Division
Group	Road
Tag	Tunnel