The Chūō Line (Rapid) is the name given to rapid services on the eastern section of the Chūō Main Line operated by the East Japan Railway Company between Tokyo and Takao stations. Some services continue to Otsuki.

The Chūō Main Line , commonly called the Chūō Line, is one of the major trunk railway lines in Japan. It connects Tokyo and Nagoya, although it is the slowest direct railway connection between the two cities; the coastal Tōkaidō Main Line is slightly faster, and the Tōkaidō Shinkansen is currently the fastest rail link between the cities.