札幌駅
The system consists of three lines: the green Namboku Line (North-South line), orange Tozai Line (East-West line), and blue Tōhō Line(North East Line). The first, the Namboku Line, was opened in 1971 prior to the 1972 Winter Olympics. The Sapporo City Subway system operates out of two main hubs: Sapporo Station and Odori Station. Most areas of the city are within a reasonable walking distance or short bus ride from one of the subway stations.