Well, tried to book a flight on Jan 5 from MMB - HND. The website says it is available and up until I enter all the info and click purchase, it gives me an error and says not available. Calling the ANA office says the flight is sold out. The ANA japan website says it is still available for the regular fare.
Just thinking that even though it says it is available till Jan 31 with no blackout, ANA is doing its internal blackout for this promotional fare.