Sega Corp.'s Joypolis amusement park in Tokyo, where a visitor died earlier this week after falling from a sky-dive tower, has had more than 50 accidents since it opened in July 1996, the police said Friday.
The Metropolitan Police Department found the accident record during a search of Sega Corp.'s headquarters and the offices of Joypolis on Thursday.
The game maker, which compiled the accident report, is suspected of professional negligence resulting in the death of Junichi Tsubouchi, 30, who died Monday after falling from the sky-dive simulator at Joypolis. Tsubouchi had a disability that required him to use a wheelchair.
Tokyo police said they would investigate all past accidents on the suspicion that Sega does not have a proper safety management system in place at the amusement park, which is in the Odaiba waterfront area.
The police said there have been many accidents involving visitors at the park, which has 23 attractions, including the sky-dive ride.
The accidents include several serious injuries, including fractured bones caused by visitors being wedged between equipment, the police said.
There were also accidents involving park employees, the police said, such as an incident in March in which an employee who was trying to pick up lost property on the floor was hit by a roller coaster and sustained a minor head injury.
Meanwhile, the Land, Infrastructure and Transportation Ministry on Friday urged all local authorities to ask amusement park operators to take precautions to ensure safety at each park before the Golden Week holidays, when many visitors flock to the attractions.