I will be flying home from KUL at the end of April through SIN. I arrive on an MH flight at 12:10 am. I will be connecting to NW 6 to NRT, but that flight doesn't leave until 6:00 am. I have a WBC ticket. Will there be a lounge open that I can hang out in? What can I do to pass the time? Also, does anybody know if I will have to claim my checked luggage? If I do, I guess that will waste some time until I can slide in to that WBC seat and relax until I reach NRT.

Thanks