For fares ex-NRT, oneworld partner JL and other airline NH, are not charging any fuel surcharges. But BA (and VS) are.
Similarly, fares ex-HKG, their oneworld partner CX is also not charging any fuel surcharges, but BA and VS are too.
Its very easily a difference of US$200 per sector!
Now above is for revenue tickets.. but is same when its an award.
Why is this so?