Six-car trains, combining two sets of three-car trains, are sometimes used on Saturdays, Sundays or in the seasons when many passengers are expected to use these trains, but one can't move between the third train car and the fourth train car because no passage between them is provided.
また、土曜・休日・多客期には2編成をつないで6両編成で運行することもある（非貫通構造のため3号車と4号車の通り抜けは不可）。