AA doesn't offer F to Japan any more, so that won't be an option. Re-routing through DFW ought to be an option based on comments above in this thread, not sure whether the voluntary overnight layover complicates things though.

(But this reference reminded me of my very first trip to Japan in the summer of 1999, flying in F on an AA MD-11 from DFW to KIX, with 2-2-2 lie-flat seating...)