Originally Posted by
shuigao
Ah. Too bad there are no F seats to Tokyo (or any Japan destination), so can't speculatively make an F redemption and hope for upgrade
[edit] Oh wait there's SQ12. Advantage only though.
631 from Haneda also flies 77W with 2013 F seat.
Check out Mainly Miles who is a great blogger who keeps up good documentation on these routes info.