Yes, you can absolutely pay for Shinkansen (bullet train) tickets with a credit or debit card in 2026. Major JR stations across Japan are equipped with green "Midori-no-madoguchi" ticket offices and blue or green automated vending machines that accept international cards, including Visa, Mastercard, and American Express. When using a machine, look for the "English" button in the top corner to navigate the menus easily. You will typically be prompted to insert your card and enter your PIN. For a more seamless digital experience, many travelers now use the Smart EX app or the JR West Online Train Reservation site to book tickets on their smartphones using a registered card, which allows for paperless entry using a linked IC card (like Suica or Pasmo) or a QR code.