You can use your transportation IC card (like Suica, PASMO, or ICOCA) for the Shinkansen, but it is not a "tap-and-go" system like a local subway. To use your IC card for the bullet train in 2026, you must first link it to a digital ticket purchased through an official reservation system like Smart EX or JR-East Train Reservation. Once you have bought your Shinkansen e-ticket online, you "register" your IC card number to that specific reservation. When you arrive at the Shinkansen gates, you tap your card on the reader; the gate recognizes your pre-paid digital reservation and allows you through, often printing a small "seat information" slip for you to keep. This "ticketless" service is highly popular because it allows you to bypass the physical ticket machines. However, you cannot simply tap your card with a cash balance to pay for the Shinkansen fare at the gate, as the bullet train requires a separate base fare and a "limited express" surcharge that the standard IC card balance is not designed to handle. Using a linked IC card or a mobile version on your iPhone/Android is currently the fastest way to board the Shinkansen across Japan.