I am trying to find an award space for my mother. While I can find plenty of award spaces (Y) between NRT and USA, I cannot find a single space between NRT and TPE for the next three months! None, nada, zero!

I have flown this route frequently, and never got the impression that this is a "popular" route. Is Inventory Management applying some sort of control on this segment? How likely will I see more availability in the next few weeks?