... and JAL NRT/SIN is also 747 with upper deck economy ... but might not be a convenient route either for jsfboat, judging from your profile
. Then again, if you find yourself in this neck of the woods...
To echo rjkrjk's comments (this is almost required knowledge here in fact)... seatguru can answer this question, but you'll have to search the hard way, airline by airline.
Deck 2 really feels like business class for the price of economy. Just hope the JAL/ANA bean-counters aren't watching this thread in case it disappears!