One carriage stopped about 20 to 30 meters above the ground on its upward track while the other stopped just before reaching the terminal of the Jurassic Park-inspired Flying Dinosaur ride, reported Japanese media.
One carriage stopped just before the end of the 1,202-yard ride, while the other stopped on an upward track almost 100 feet in the air.
Riders on a Universal Studios Japan roller coaster were stranded for hours "mid-flight" when the coaster malfunctioned. People got in the line again for the ride as soon as it reopened shortly afterward, Japanese news agency Kyodo reported.
The park apologised over the incident and said the problem was caused by a motor-regulating device on the rail.
The thrillseekers were midway through the Flying Dinosaur ride at the amusement park in Osaka on Tuesday when the coaster stalled
Universal Studios Japan averages more than ten million visitors per year and is one of four Universal Studios theme parks in the world.
"It's already a terrifying ride, so I want them to operate it safely", another woman, who rode the ride shortly before it stalled, told the Times.
It says the defective part was replaced and the ride resumed on Tuesday night after a test run.
A prior incident in September previous year left more than 30 passengers stuck when the ride suddenly stopped.
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