Yes, you can use a Suica (or Pasmo) card in Hakone for many local transportation options, including the Hakone Tozan Railway, Hakone Tozan Buses, and even some shops and vending machines. However, it is important to note that the Suica does not cover the specialized tourist transport like the Hakone Ropeway or the Sightseeing Pirate Ship as a standard fare tap. For those, you would typically need a separate ticket or the Hakone Free Pass. While you can use Suica to pay for the "Romancecar" limited express from Shinjuku, you must still purchase a separate "limited express ticket" in addition to the base fare. In 2026, while the Suica is convenient for basic transit, the Hakone Free Pass remains the gold standard for visitors because it bundles all the region's unique transport into one price, saving significant money compared to individual taps.