Now experts are trying to figure out what went wrong with the Tohoku Shinkansen Hayabusa-Komachi No. 6. The mishap occurred shortly after 8 a.m. on Sept. 19. “I felt it stopping silently.

All passengers were instructed to leave the train, and the Hayabusa No. 52 operation was suspended. Some Tohoku Shinkansen trains bound for Tokyo were delayed between Morioka and the capital.