The Tozai Line, operated by Tokyo Metro, is one of the busiest and most important subway lines in Tokyo, Japan. It is designated as Line 5 and spans approximately 30.8 km (19.1 miles) with 23 stations. The line's color is sky blue, and it uses the symbol T followed by the station number for easy identification. The name "Tozai" means "East-West," reflecting its route across Tokyo and into neighboring Chiba Prefecture.
