E231 Series Train and E233 Series Train at JR Yotsuya Station in 2018 April: 6

Roof pattern of car No.4 of E231 series was different from the other cars of the train. E231 series of Yamanote once had six-door cars, and they were replaced with four-door cars because they were a big problem for platform doors. The car No.4 was one of the replaced cars. The recently added car has a little different design.

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