A 6300 Series train from the second batch operating on the Meguro Line

A 6300 Series from the third batch of trains with a remodeled skirt 
(Courtesy of Uraken.net)

Toei Subway 6300 Series

Operated on the Toei Mita Line and the Tokyu Meguro Line

In Service: 1993 - Present
Top Speed:
110km/h (Service)
120km/h (Design)
Length:
20250mm (End cars)
20000mm (Middle cars)
Width: 2783mm
Consist/Formation:
3 motorized cars + 3 trailer cars (6 cars)
Electric System: 1500v DC through overhead wires
Gauge: 1067mm (Narrow)
Number Built: 144 cars

The 6300 Series is a four-door commuter-type electric multiple unit designed by the Bureau of Transportation Tokyo Metropolitan Government for use on the Mita Line.

The original purpose of the 6300 Series was to replace the older 6000 Series trains that were not equipped with air-conditioning.

Production was stopped once this was completed but was restarted in the year 2000 when the Mita Line was connected with the Tokyu Meguro Line. Building more 6300 Series trains ended up being cheaper than modifying the remaining 6000 Series trains for use on the Meguro Line.

The first two batches of trains (Formations 1-13) are controlled by variable frequency drive with GTO elements while the third batch (Formations 14 and on) use IGBT elements.