The Romancecar is the reserved-seat way into Hakone from Shinjuku, and it is the part of a Hakone day most likely to be already taken. Everything else in the area runs on turn-up transport, so the train is the only piece with a date attached.
The most common booking mistake is not the timing but the ticket structure: buying the limited express ticket alone does not entitle you to travel. Plan both tickets as one purchase.


