unfortunately has others have said you're most likely out of luck, baring some random release that you just happen to spot and are able to grab - most specially in J - due to the peak travel period. You're not the only ones who want to go snow, or any number of other things during this popular period.
Unfortunately this is one of those situations where being able to plan ahead and jump on things as released is your best bet.
Having sad that, you could TRY to get creative - for example look to get to a point in Asia, and look for reward seats from there (for example on Malaysian via KUL, or Cathay via HKG, or JL direct of course). Other options may be lower cost airlines with a premium cabin such as Jetstar or Scoot. Anoher longer way around may be to try multi city and see what is available via China Airlines (CI) - though I suspect any seats have already been snapped up.
Of course given the high demand period, prices will be at a premium, let alone rare options for reward seats, but if you want to use points you may need to get very creative.
The other thing is that perhaps if you have any points in another program like Virgin VFF or a Singapore Airlines account may offer options on carriers like ANA (NH) or Singapore Airlines (SQ).
