No. Bus services and travel dates cannot be changed.
If you wish to change your departure time or travel date, please cancel your existing reservation and make a new one.
Please note that a cancellation fee may apply when canceling your original reservation.

You can reduce the number of passengers, but you cannot add passengers to an existing reservation.

To reduce the number of passengers, go to My Page → [View / Change / Cancel Reservation].

Until 5:00 p.m. two days before departure:
You can make changes through My Page.
■ My Page Login
https://www.kosokubus.com/_en/?page=login
*Please note that some bus services cannot be changed online.

After 5:00 p.m. two days before departure:
Please contact us by email: info-inbound@kosokubus.com

If you cannot make changes through My Page:
・The bus operator does not allow changes after booking.

To add passengers:
Passengers cannot be added to an existing reservation. Please make a separate new reservation for any additional passengers.

You can change your boarding or drop-off location through My Page if there is no change in fare.
Go to My Page → [View / Change / Cancel Reservation] to make the change.
*Please note that some bus services do not allow changes after booking.

Until 5:00 p.m. two days before departure:
You can make changes online through My Page.
*If you are unable to make the change through My Page, please contact us by email.
■ My Page Login
https://www.kosokubus.com/_en/?page=login

After 5:00 p.m. two days before departure:
Please contact us by email: info-inbound@kosokubus.com

You may not be able to make changes through My Page in the following cases:
・Your reservation was made with a discounted fare, such as [Early Bird], [Early Booking Discount], or [Advance Discount].
・Changing your boarding or drop-off location would result in a fare difference.
・The bus operator does not allow changes after booking.

The gender on a reservation cannot be changed. If you need to change it, please cancel your existing reservation and make a new one. Please note that the applicable cancellation fee will be charged when canceling your original reservation.

It depends on the bus service.

For services marked [Mobile Boarding Pass Required] or [QR Code] in the service name:
The passenger information entered at the time of booking cannot be changed. If you need to make a change, please contact the Kosoku Bus.com Center by phone or chat during business hours.

For services not marked [Mobile Boarding Pass Required] or [QR Code] in the service name:
The passenger’s gender cannot be changed.
Until 5:00 p.m. two days before departure, you can change the passenger information through My Page.
After 5:00 p.m. two days before departure, please contact the Kosoku Bus.com Center by email.

Until 5:00 p.m. two days before departure:
Make changes online through My Page.
■ My Page Login
https://www.kosokubus.com/_en/?page=login

After 5:00 p.m. two days before departure:
Please contact us by email during business hours.
■ Email
info-inbound@kosokubus.com