Hi! This is my first time using AS points for an international flight. We will be flying JAL first class from LAX to NRT In a few weeks. We are starting in Seattle (SEA - LAX on AS). Question is... when we Check in at SeaTac with Alaska, will they put our luggage through to Tokyo and print second boarding passes (JAL LAX-NRT)? Or do we, upon landing in LAX, have to pick up our luggage and check in thru JAL?

I was reading a flight review online and someone mentioned they had the Qantas lounge print their JAL boarding pass tickets (after connecting from Seattle). So I was curious if AS prints JAL tickets or not at SeaTac. Thanks !!