The Nambu Line is a railway line in Japan that connects the cities of Tachikawa and Kawaguchi. It is operated by East Japan Railway Company (JR East) and serves as a vital transportation route for commuters in the Tokyo metropolitan area. The line spans approximately 40 kilometers and features several stations along its route. Opened in 1966, the Nambu Line primarily runs through the western suburbs of Tokyo. It provides access to various neighborhoods and commercial areas, making it an essential part of the local transit system. The line is known for its frequent service and connections to other major rail lines.