 Trains consist of a nine-car main set (with five cars motored), numbered S101 onward, and a three-car add-on set, numbered S201 onward, with car 1 at the southern (Shinjuku) end as follows.Cars 2 and 5 each have two single-arm pantographs (only one is normally used), and cars 7 and 10 each have one.Cars 1 and 3 each have only one motored bogie (at the inner ends).