Yes, you can absolutely use an IC card (such as Suica, PASMO, or the Welcome Suica for tourists) on almost all buses in Tokyo in 2026. This is the most efficient way to travel, as it eliminates the need to carry exact change. On most Toei and private buses in central Tokyo, you simply tap your card on the reader near the driver when boarding; these routes typically have a flat fare (currently 210 yen). On buses that travel to the suburbs where fares are distance-based, you must tap the reader both when entering at the middle door and when exiting at the front. Mobile versions of Suica and PASMO on iPhones or Androids also work perfectly. For a 2026 traveler, the "pro-tip" is to ensure your card is topped up at a convenience store or train station, as many bus drivers cannot break large bills or recharge cards while the bus is in motion.