To navigate the Tokyo Subway in 2026, you primarily need a contactless IC card, such as a Suica or a PASMO. While both cards are virtually identical in function, Suica is issued by JR East, while PASMO is issued by private railway and subway companies. For short-term tourists, the "Welcome Suica" or "PASMO PASSPORT" are high-value choices because they do not require the standard ¥500 deposit and feature unique souvenir designs. A major 2026 "pro-tip" is to use Mobile Suica or Mobile PASMO on your iPhone or Android device; this allows you to tap-and-go through the ticket gates using your phone and top up your balance instantly with your credit card. If you plan on doing a massive amount of sightseeing within a 24, 48, or 72-hour window, you might also consider the Tokyo Subway Ticket, which offers unlimited rides on all Tokyo Metro and Toei Subway lines for a fixed price, though it doesn't work on the JR lines like the popular Yamanote loop.