I can't make a reservation for my seat, but is it possible to board?

You can board the flight.
If you are unable to select a seat in advance, please complete seat selection via online check-in from 24 hours prior to boarding.
If you are unable to select a seat during online check-in, contact airport staff on your boarding date.
[About the limits for the number of seats of the advanced seat reservation]
As we have the some restrictions upon the advanced seat reservation by following reasons, sometimes you cannot designate your seat on the Internet in advance.
・Safety reasons such as balance adjustment.
・Keeping the seat for those who needs wheel chairs.
・For those who need any assistance such as being with guide dogs.