A subway line in Yokohama City near Tokyo resumed full operation on Monday, after four days of partial suspension due to a derailment.
The accident occurred on Thursday morning in the city's Izumi ward. A train on the Yokohama Municipal Subway Blue Line derailed after running over equipment mistakenly left on the rails by workers doing overnight maintenance work.
Service was suspended for a stretch of nearly six kilometers while municipal transport authorities removed the derailed carriages and repaired the damaged rails.
Safety was confirmed and full operation was resumed on Monday morning. Trains are now running at about eight-minute intervals.
A Yokohama City Transportation Bureau official has apologized to passengers for the inconvenience.
The official said the subway's employees will work together to provide safe transportation and regain the public's trust.