About vehicle damage due to overrun on the Blue Line Odoriba Station drop-in line

At around 8:35 am today, at the Municipal Subway Blue Line, after getting off the customer, a train from Azamino Station to Odoriba Station entered the drop-in line for turning operation, crossed the original stop position, I came into contact with the front wall.
The rapid train service will be canceled all day today, but regular trains are operated on all lines.
We apologize for any inconvenience this may have caused to you.

1 Date and time of occurrence
　Thursday, August 29, 2019 around 8:35 am
　Municipal Subway Blue Line Odoriba Station (1-2-1 Nakata Minami, Izumi-ku)

2 The train
　Azamino Station departs at 7:34 am (down) bound for Odoriba Station 701b train (6-car train)

3 Outbreak status
　8:35 After the customer gets off at Odoriba Station, the upbound main line is to return at Odoriba Station.
　While moving to a track called a drop-in line between the down main line, the original stoppage was stopped.
　Beyond the position, it came into contact with the wall in front, damaging the body.

4 Causes
　The train driver reported that he fell asleep when entering the service line.
　In the future, we will investigate the detailed causes.