In 2026, while not legally "required," a Suica card (or an equivalent IC card like PASMO) is considered essential for a smooth Tokyo experience. These "tap-and-go" cards serve as both a transit pass for all trains, subways, and buses, and a digital wallet for convenience stores, vending machines, and lockers. As of 2026, the Welcome Suica Mobile app has become the primary choice for international tourists, allowing iPhone and Android users to add a virtual card to their digital wallets before they even arrive in Japan. This bypasses the need to wait in line for physical cards at the airport. However, physical cards are still available at major stations for those who prefer them or for children without smartphones. Without an IC card, you would have to purchase individual paper tickets for every single journey—a process that is time-consuming, requires cash, and makes transferring between different rail companies (like JR and Tokyo Metro) significantly more complicated and expensive.