The Fujikyuko Line, which connects Otsuki Station to Kawaguchiko Station (the gateway to Mt. Fuji), is a private railway and is not fully covered by the standard nationwide Japan Rail Pass (JR Pass). While you can use your JR Pass to travel as far as Otsuki on the JR Chuo Line, you must typically purchase a separate ticket or use an IC card (like Suica or Pasmo) for the final leg on the Fujikyuko Line. However, in 2026, there is a grounded exception: the JR TOKYO Wide Pass does cover the Fujikyuko Line in its entirety, including the "Fuji Excursion" limited express trains that run directly from Shinjuku. If you are using the standard JR Pass and stay on a "direct" JR train that transitions onto the Fujikyuko tracks, you will be asked to pay a "supplemental fare" to the conductor or at the fare adjustment gate upon arrival at Kawaguchiko. This is a supportive peer tip for travelers: always calculate if the 1,170+ yen one-way fare fits into your budget before assuming your rail pass covers every "Fuji-bound" track.