You will have access to whatever lounge QF is now contracting with; I believe it is now the BA Terraces lounge (but operating as a contract lounge, and not as a Terraces during these hours). This is much nicer than the Sakura lounge, which QF used to use because it was cheap. If you can get airside, you also have AC access, but I think AS arrives in the other terminal so you cannot reach the AC without special arrangements (it isn't as nice as the QF lounge in any event). I'm guessing that by October JL will have closed the Sakura lounge and arranged with BA to use their lounge, but nothing has been announced. If JL does keep it, they really need to rebuild this lounge (it is sub-TBIT quality).