As with the earlier 3150 series, individual seats are 470 mm wide.

Wheelchair spaces are located behind the driver's cab in both cars on each end of the train.

[1] On the first two batches, the floor had a subtle blue-gray, two-color combination, but starting with the third batch of cars produced in 2009, cars have pale gray, single-color doors with yellow lines surrounding the door for improved visibility.

The main electrical system is Toshiba's gate turn-off thyristor field chopper control used in the 1000 series.

The series was remodeled with a load compensating device which adjusts brake power to support changes in the car's body weight which increased the passenger limit.

The bogies attached to the control cars have their brake piping divided into two parts, and have been modified with anti-slip equipment.