HI

I will be transiting in Narita for 7 hrs from NY on the way back to Sydney, on AA then Qantas at 9.25pm. Can i check my luggage all the way through to Sydney or do i have to recheck my bags?

Do i need to go recheck in again to get boarding pass? If so, what is the time when the counters would open for the Qantas check in? I plan to recheck in before i venture out of the airport.