I have a friend who lives in NYC and wants to buy a ONE4 ex-Australia. Must visit japan on the way to NA (and not on way to/from Europe).

Problem is this:
- if routing is MEL-NRT-JFK-LHR-MEL that won't be allowed as LHR-MEL counts as going via Asia and it would be going to Asia for a second time.
- routing could be MEL-NRT(maybe via HKG)-LHR-JFK-MEL but can't go to NRT and LHR during same 'trip' - he lives in NYC.
- could buy a ONE5 and go MEL-NRT-JFK-LHR-???-MEL - but I don't know a OW routing from LHR-MEL other than through Asia(BKK, HKG, SIN).

Any help appreciated.