Toei Oedo Subway Line (都営地下鉄大江戸線) - Nakai (中井駅) to Shinjuku (西新宿五丁目駅) Tunnel Construction (1997)
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Published on ● Video Link: https://www.youtube.com/watch?v=c6EXw7csKhc
Tokyo Broadcasting: 中井駅 - 西新宿五丁目駅 walkthrough of the construction site around 3 years before the complete line opened up for service in 2000 (various segments opened earlier as completed).