The Tozai Line is a rapid transit line in the Tokyo metropolitan area, operated by the Tokyo Metro. It runs from Nakano Station in the west to Toyocho Station in the east, covering a distance of approximately 30 kilometers. The line is known for its efficient service and connects several important districts, making it a vital part of Tokyo's public transportation network. Opened in 1964, the Tozai Line features a total of 23 stations. It is characterized by its distinct blue color on maps and is often used by commuters traveling to business districts and residential areas. The line also connects with other major lines, enhancing accessibility throughout the city.