[5] The trains have aluminium alloy bodies,[2] and direct current motors with field-added-excitation control.

[4] During refurbishment the controls of car 2 were changed to IGBT/SiC Hybrid module-VFD.

[2] A total of 60 vehicles were built by Kawasaki Heavy Industries until 1995.

Modifications include changes in the exterior design, a modified interior with wheelchair and stoller spaces, and IGBT/SiC Hybrid module-VVVF inverter control in car 2.

[5] The number of motored cars was reduced from four to three per six-car set.