As covered many times in the past year, Avianca Lifemiles is great for one way award ticket US to Japan or Taiwan: it takes just 12.5k miles in coach and 25k in business! Many articles out there; two sample ones here if you would like to read more:
themrpickles/2013/09/20/ business-class-10k-miles-one- way-asia-via-cabotage-route/
Application Link: http://www.lifemilesvisa.com/credit/offer.do?redirect=19839es&lang=en
If you apply today, you'll get 20,000 Bonus LifeMiles with your first purchase and also receive an additional 20,000 Bonus LifeMiles when you spend $3,000 with your card within the first 120 days of account opening. The annual fee is waived in the 1st year then its $75.
Offer expires April 30, 2014!