Suburban rail operations and subway lines are also very integrated. Frequent and high-capacity suburban trains from the suburbs commonly continue directly into the subway network to serve central Tokyo, often emerging on the other side of the city to serve another company's surface suburban lines, behaving like an S-bahn network.
Suburban rail systems and subway lines are also highly interconnected. Frequent, high-capacity suburban trains from the suburbs frequently travel directly into the subway network to serve central Tokyo, often emerging on the other side of the city to serve another company's surface suburban lines, acting like an S-Bahn network.