No, the standard Japan Rail Pass (JR Pass) cannot be used on the Tokyo Subway (the Tokyo Metro or Toei Subway lines) in 2026. The JR Pass is strictly for trains operated by the Japan Railways Group, such as the Shinkansen (bullet trains) and the Yamanote Loop Line, which is a very useful overground train that circles central Tokyo. If your destination requires a subway line (like the Ginza or Marunouchi lines), you will need to pay separately using an IC Card (like Suica or Pasmo) or purchase a dedicated Tokyo Subway Ticket (available for 24, 48, or 72 hours). For a 2026 "supportive hack": many major districts like Shinjuku, Shibuya, and Ueno are served by both JR and Subway lines, so you can often reach your destination using only your JR Pass if you don't mind a slightly longer walk from a JR station. Always use a navigation app to filter for "JR lines only" to maximize your pass's value.