I am VERY glad too say: No. At least not all of it. For our flight to Bangkok, using our 4 EXP systemwide upgrades, American confirmed our business class seats from the US to Japan, and also the return. The Tokyo-Bangkok-Tokyo flight is an American codeshare on JAL. Since it has the AA #, we get credit for the EQM, but not an upgrade to business for those two legs. Pro Tip: On a codeshare flight, always ask for the other carriers record locator number from AA... that way you can book seats in advance, which we did. If not, you get whatever seats are left day of departure..