Location: Osaka, Japan
Ride: Fujin Raijin II
What happened: One of Japan’s worst roller coaster accidents happened when the coaster derailed. This accident claimed the life of one college student and injured 19 others when the cars went flying off the tracks. After an investigation, it was discovered that it had bad axles and had not been replaced in 15 years. When the park reopened, even more poor quality axles were found on their coasters.