In 2026, the Japan Rail (JR) network remains the backbone of Tokyo's transit. The most famous is the Yamanote Line, the green-colored loop connecting major hubs like Shinjuku, Shibuya, and Tokyo Station. Other critical lines include the Chuo Main Line (orange) for east-west travel, the Sobu Line (yellow) for local cross-city trips, and the Keihin-Tohoku Line (cyan) which runs north-south toward Yokohama and Saitama. The Saikyo Line and Shonan-Shinjuku Line provide high-speed vertical connections, while the Keiyo Line takes you toward Tokyo Disneyland. Additionally, all Shinkansen (bullet trains) departing from Tokyo or Ueno are JR-operated. For 2026 travelers, these lines are distinct because they are the only ones covered by the JR Pass; Tokyo's "Subway" lines (Ginza, Marunouchi, etc.) are operated by separate companies like Tokyo Metro and Toei, not JR.