I will have a flight from Seoul, Incheon -> Tokyo, Narita -> Auckland, NZ -> Sydney, Australia, all in one booking. The first flight is operated by Asiana Airline, while the rest will be operated Air New Zealand.
My question is if I can get all 3 flight boarding passes when checking in at Incheon airport with Asiana? I notice that Seoul-Tokyo is a codeshare flight between Asiana & ANZ, but onward flights from Tokyo-Auckland-Sydney are solely operated by ANZ.
My flight is due next week so any advice now is highly appreciated.