According to the report, the accident occurred at 9:45 a.m. local time (00:45 GMT) on the Keinawa Expressway in the vicinity of Kashihara city.
A truck has allegedly rear-ended a passenger car standing at a traffic light at the highway's exit, prompting the latter to collide with several other vehicles, the report said. A total of 20 cars have been damaged.
According to the media, all of the victims are conscious.