The Chiyoda Line is a rapid transit line in the Tokyo Metro system, operating in the Tokyo metropolitan area. It connects the northern suburbs of Kawaguchi and Saitama to central Tokyo, facilitating easy access to major districts like Shinjuku and Shibuya. The line is identified by its light green color on maps. Opened in 1972, the Chiyoda Line spans approximately 24 kilometers and has 24 stations. It is known for its efficient service and is a vital transportation route for commuters. The line also connects with several other lines, including the Yamanote Line and Toei Subway, enhancing its accessibility.