We have family of four traveling NRT-ICN, two in business on JL award ticket using BA Avios, and two in coach on a Korean Air codeshare ticket, everyone on exactly same flight.

Can we all check in at the business checkin for Japan Airlines?

I hope we don't have to go back and forth to Korean Air.

So far we cannot get seat assignments for the KE booking as neither airline will touch the reservation for seat assignments.

Thanks.