A bullet train hurtling along at 280 kilometers per hour ran for 40 seconds with one of its doors completely open on Wednesday, its operator said.
The accident, due to human error, was a rare mishap for the shinkansen which has a world-famous safety and punctuality record.
The Tokyo-bound Hayabusa No. 46 train screeched to an emergency stop in a tunnel at 10:15 a.m. after leaving Sendai station in Miyagi Prefecture at 10:07 a.m., when the conductor saw a warning light that the door of the ninth carriage was open, East Japan Railway said.
"The conductor checked the carriage and found that the door was completely open," a company spokesman told AFP.
"Some 340 passengers were on board but no one was injured," he said, adding that the train resumed its journey after a check-up. "The incident occurred after a janitor mistakenly left the carriage door unlocked so that they could manually open and close."
"We sincerely apologize for the incident," he said, adding that the company will take steps to prevent it happening again. The force of the wind is believed to have opened the door, JR said.
Japan is a pioneer in high-speed rail networks, hailed for their punctuality and safety measures, including the emergency stop system, which can automatically slow trains down before a major earthquake strikes.© 2019 AFP