TOKYO - The Japanese company behind the country's iconic bullet trains said on Wednesday (Feb 28) it had supplied nearly 150 faulty wheel parts that could crack and potentially cause a derailment.
Kawasaki Heavy Industries launched an investigation after a crack was found in its parts under one carriage of a Shinkansen in December.
Kawasaki found that the likely cause of the crack was that steel frames connecting the wheels to the chassis were thinner than regulations stipulate.
It said similar problems were found in a total of 146 parts on bullet trains owned by two operators, which were reportedly exchanging them even though there were no immediate fears of cracks.
"I apologise for causing great trouble and worries," Kawasaki Heavy Industries president Yoshinori Kanehana told a news conference.