Are you switching planes? Not sure if they will let you switch without being processed. The local station rep will know what to do with you. If you end up processing through immigration you could hang out at the airport or catch a lift with a crew to the hotel. If you go to the hotel, the outbound crew will be meeting on lobby two hours prior to departure
If you hang out at the airport, the operating crew will be dropped off at NRT, terminal two, 3rd floor about 1 hour 40 prior to departure. The meeting point is inside the terminal, front of the NAA rendezvous plaza number (13) that was once a Starbucks coffee.