A 34-year-old man died after falling off a roller coaster at a popular amusement park in Tokyo on Sunday, in the third incident there in three months, officials said.
The man fell from a four-seat vehicle on the Spinning Coaster Maihime (Dancing Princess) when it reached a curve some eight metres (26 feet) above the ground.
Police suspected the man, whose name was not immediately released, might have failed to properly lock himself into the ride at the Tokyo Dome City Attractions park with a safety bar.
At the same park in November, a female worker had three of her fingers cut off when she was inspecting a motor in a vertical drop ride, a park official said.
In December, a small girl was slightly injured when a bolt came off another roller coaster and hit her, she added.