The injured — a train conductor in his 20s and two male passengers aged 23 and 79 — were taken to nearby hospital for treatment. Their injuries were not life-threatening, police said.

There are four films with the name Bullet Train in the title, which can be confusing when searching for one in particular. There’s Bullet Train (2022, with Brad Pitt), The Bullet Train (1975), Bullet ...

A version of this article appears in print on , Section A, Page 8 of the New York edition with the headline: As Japan’s Commuters Slept, a 3D-Printed Train Station Rose in 6 Hours.