The Tōzai Line is a major subway line in the Tokyo metropolitan area, operated by the Tokyo Metro. It runs from Nakano Station in the west to Toyosu Station in the east, covering a distance of approximately 30 kilometers. The line is known for its efficient service and connects several important districts, including Shinjuku and Chiba. Opened in 1964, the Tōzai Line features 24 stations and is characterized by its distinct blue color on subway maps. It plays a crucial role in daily commuting for residents and visitors, providing access to various commercial and cultural hubs throughout Tokyo.