1. Present value, or rather value as of 12/31/2013. (I guess you could add a worksheet, which the instructions suggest, showing liabilities.)
2. Again, value on 12/31/2013. (Not sure how you do this for real estate.)
3. Tax rates: at this point, nothing.
But in the future, when you die, and there are heirs here in Japan, the NTA might be interested.