Your best bet is to go for the 15,000 mile award by earning another 2500 points. I would recommend that the next flight you and your wife take on American or TWA that is 2500+ miles, you credit to JAL instead of AAdvantage.
Another option is the Amex Starwood credit card which can earn points transferable to JAL, so you could charge your way to 15,000 miles, but the exchange ratio of 2:1 is not good.
[This message has been edited by anthonyanthony (edited 01-05-2002).]