For passengers only, no special documents are required. Simply fill out the boarding application form distributed at the counter on the day of departure. If traveling with a vehicle, you will need your vehicle inspection certificate (shaken). Use the information from the certificate to complete the vehicle transport application form and submit it at the counter.
Passengers requesting student discounts, disability discounts, or other discounts must present proof (such as a student ID) at the counter, so please prepare these documents in advance.
Even if you have made a reservation in advance, you will still need to fill out the application form and complete the counter procedure on the day of departure.