When was the first bullet train built?
Shinkansen
In addition, the Basic Plan specified that the Jōetsu Shinkansen should start from Shinjuku, not Tokyo Station, which would have required building an additional 30km of track between Shinjuku and Ōmiya. While no construction work was ever started, land along the proposed track, including an underground section leading to Shinjuku Station, remains reserved. If capacity on the current Tokyo–Ōmiya section proves insufficient, at some point, construction of the Shinjuku–Ōmiya link may be reconsidered.