East Japan Railway Co. is installing video cameras in the driver compartments of all its trains in Tokyo to facilitate accident investigations.
Event recorders have been mounted in all trains on the Chuo Line, which has been plagued by suicides for decades, and are slated to spread to other key lines in fiscal 2014, JR East said.
The company said its takes police a long time to determine whether people are falling onto the tracks accidently or jumping onto them deliberately, and that the recorders should help speed up the investigatory process.
Event recorders are rare on trains but are progressively being installed in taxis and transport trucks, JR East said.