section_path: Transportation/Rail
section_name: Rail
paragraph_text: Rail
  
  Rail is the primary mode of transportation in Tokyo, which has the most extensive urban railway network in the world and an equally extensive network of surface lines. JR East operates Tokyo's largest railway network, including the Yamanote Line loop that circles central Tokyo. It operates rail lines throughout the entire metropolitan area of Tokyo and the rest of northeastern Honshu. JR East is also responsible for the Shinkansen high-speed rail lines that link Tokyo and the Northeastern cities of Japan (Joetsu Shinkansen, Tohoku/Hokkaido Shinkansen, Yamagata Shinkansen, Akita Shinkansen, Hokuriku Shinkansen). The Tokaido Shinkansen, which links Tokyo and Osaka via Nagoya and Kyoto, as well as western cities beyond, is operated by JR Central. The Chuo Shinkansen, the first-ever long-distance high-speed floating maglev line currently under construction, will also be operated by JR Central. Both JR companies were created from the privatization of Japan National Railways in 1987. JR Freight does not own any part of the railway network but operates freight trains on the JR network.Two different entities operate Tokyo's underground railway network: the privatized Tokyo Metro, which operates Tokyo Metro lines, and the governmental Tokyo Metropolitan Bureau of Transportation, which operates Toei lines. Tokyo Metro is entirely owned by the Japanese Government and the Tokyo Metropolitan Government since it was privatized in 2004 (it was previously a public entity called the Imperial Capital Rapid Transit Authority from 1941 to 2004), but it is scheduled to go public in 2024. Other major railway operators in Tokyo include Odakyu, Tokyu, Keio, Seibu, Tobu, and Keisei. Although each operator directly owns its railway lines, services that travel across different lines owned by different operators are common.
  
  Tokyo once had an extensive tram network, with a total distance of 213 km (Tokyo Toden). However, similar to other major cities worldwide, the age of motorization since the 1950s made it considered unfit to share busy roads with cars. Today, only one line, the Arakawa line, remains.