No, the Tokyo Subway is not covered by the Japan Rail (JR) Pass. The JR Pass is strictly for trains operated by the Japan Railways Group, such as the Shinkansen (bullet trains) and the JR Yamanote Line (the green loop line that circles central Tokyo). The Tokyo Subway system is operated by two completely different companies: Tokyo Metro and Toei Subway. To ride these lines, you must use a separate ticket or a prepaid IC card like Suica or Pasmo. In 2026, many tourists find it more economical to purchase a "Tokyo Subway Ticket" (available in 24, 48, or 72-hour versions) for unlimited travel on the metro lines, as the JR Pass is generally too expensive if you are only staying within the city limits. If your itinerary involves only traveling between major hubs like Shinjuku, Shibuya, and Tokyo Station, the JR Yamanote line (included in your JR Pass) may suffice, but for almost any other destination in the city, you will need to pay for the subway.