The Itsukaichi Line (五日市線 Itsukaichi-sen) is a railway line operated by East Japan Railway Company (JR East) in Tokyo, Japan. It links Musashi-Itsukaichi Station in the city of Akiruno with Haijima Station in the city of Akishima. From there, some trains travel through to Tachikawa Station via the Ōme Line, and a very few continue from Tachikawa along the Chūō Line to Tokyo Station. This line can only accommodate trains of 4- or 6-car lengths.