Reservations can be made online only.
Online Booking (Kosoku Bus.com app / PC website / mobile website)

Business Hours:
Monday–Friday, 10:00–17:00 (Closed on Saturdays, Sundays, and public holidays)

Yes. Same-day reservations are available.
If seats are available, they will appear in the search results.

Please make your reservation for the day before your desired arrival date.
Example: For a bus arriving on the morning of January 2 → Search for a January 1 departure.
A bus listed as departing at around 25:00 on January 1 (actually around 1:00 a.m. on January 2) is also considered a bus arriving on the morning of January 2.

It varies by bus service, but reservations for most services open one to two months before the departure date.

No. For each reservation, only one boarding location and one drop-off location can be selected.

Yes. The limit varies depending on the bus service. The maximum number of passengers you can book at one time is shown below the fare categories on the service details page.

If you are booking for multiple passengers and receive an error even though seats are available, you may have exceeded the maximum number of passengers allowed per reservation. Please split your group into multiple reservations.

Yes. In the [Passenger Information] section, select “I will not be traveling” to enter the details of the person who will actually be traveling.
This option is not available for guest bookings.
If booking as a guest, please make the reservation using the passenger’s information.

No consent form is required, and minors may travel without an adult.
If traveling on an overnight bus, please take appropriate precautions for your safety.

Some bus services have restrictions on the boarding and drop-off locations you can select.
For services marked [Boarding and Drop-off Restrictions Apply], certain boarding or drop-off locations may not be available depending on your travel date.

If you select an unavailable boarding or drop-off location, you will receive an error and your reservation will not be completed. Please select a different boarding or drop-off location or choose another bus service.

There are several possible reasons why you may be unable to make a reservation:

・No seats are available.
・On a bus with four seats per row, the only remaining seat may be next to a passenger of a different gender.
・The booking deadline has passed.
→ If the same bus service no longer appears in the search results when you search again, there are no seats available for booking or the booking deadline has passed. Please select another bus service.

・The system may be undergoing scheduled maintenance:
　JR Bus: 1:00–5:00 a.m.
　Services with a service code beginning with “Z”: 2:00–5:00 a.m.

・An error may have occurred during the booking or payment process:
　・3D Secure authentication was not completed successfully.
　・Your PayPay balance was insufficient.
　・The payment screen was closed or you navigated to another page before the payment was completed.

Before making another reservation, please be sure to check your reservation history on My Page.
Please confirm that your reservation was not completed before making a new reservation.

■ My Page Login
https://www.kosokubus.com/_en/?page=login

We recommend allowing at least two hours between buses.
As buses may be delayed, please make sure to allow plenty of time when booking your connecting bus. We recommend leaving at least two hours between connections.