In 2026, the answer depends on which version of the Suica you are purchasing. If you are buying a physical, standard Suica card from a ticket machine at a JR East station, you generally must use cash (Yen) for the initial purchase and for all subsequent top-ups at the machine. However, the "Welcome Suica" (designed for tourists) can be purchased with a credit card at dedicated vending machines in Haneda and Narita airports. The most convenient 2026 method is the Mobile Suica, which you can add directly to your Apple Wallet or Google Pay on your smartphone. The Mobile Suica allows you to load and top up funds using your linked credit card instantly, bypassing the need for physical machines or cash entirely. It is worth noting that due to ongoing global chip shortages in 2026, the availability of physical "anonymous" Suica cards at stations is sometimes restricted, making the digital/mobile version the most reliable and credit-card-friendly option for visitors.