also - NRT Hilton has shuttle bus (FREE) that will take you to the airport terminal where you can meet the FDX crew outside security - go through with them & out to the airplane with them for your jumpseat.
NRT Ramp will coordinate for a separate taxi pickup for deviators, but now they charge you (even though you have a scheduled pickup) - I recommend just take the free shuttle bus - it's no hassle & only takes about 10 minutes from hotel to PAX terminal
NRT Ramp will also change your shore pass to reflect going out on the jumpseat vs. PAX out.
Email them with the details & just tell them you'll get your own transport to the airport terminal & they'll cancel the taxi.