I'm on an ANA flight from the US to Narita Tokyo. I'm hoping to connect to Thailand on a Thai Airways flight that leaves Narita 2 hours after my flight arrives at Narita. The Thai airways fight would be on a separate ticket (I already ticketed my ANA flight).

Does ANA check baggage through on Star Aliance partners, like Thai Airways, on separate tickets? Or, will I need to find a flight with a longer layover to add time for clearing immigration and re-checking in my luggage to Thailand.

Thanks for your help!