At Haneda international, you can not gain fasttrack even yor are OWE.
You have to be the Emerald of your flight.
When I was CX DM(OWE), JL Sapphire(OWS), I couldn't get thru fasttrack for JL flight.
For JL domestic flight from Haneda, OWE can use first class checkin and dedicated security, and first class lounge.