橫須賀線
Shōnan-Shinjuku Line trains enter or exit the Yokosuka Line at Nishi-Ōi. Utsunomiya–Yokosuka Line through services make all stops on the Yokosuka Line between Nishi-Ōi and Zushi, while Takasaki–Tōkaidō Line through services operate Rapid service within the Yokosuka Line, between Nishi-Ōi and Ōfuna, skipping Nishi-Ōi, Shin-Kawasaki, Hodogaya and Higashi-Totsuka.