I'll be flying NH802 SIN-NRT next month - it's scheduled to land at Terminal 1 at 2.35pm, although i've been checking flightaware over the past month and it seems to land early 80% of the time.

I need to catch a bus afterwards from Terminal 2 - there's one that leaves at 3.30, and another at 4.20.

I know the 3.30pm one will be a rush and won't be guaranteed, but is there even a slight chance I could catch it? I'll be on J so I would deplane and get my bags ahead of most people on the plane, but I don't know how immigration is like at Narita in the afternoons.

My thought process is - if it lands 20-30 minutes early, then it would take ~20 minutes to taxi to gate and deplane, 30 minutes for immigration and 15-20 minutes for bus transfer to T2, which would allow me to possibly make the 3.30 bus.

If there's a fair chance I could make the 3.30, then I'll hold off on making bus reservations and monitor the available seats to see if I can just rock up and pay on the spot when I land; if this is completely crazy and 100% impossible then I'll reserve a spot on the 4.20pm bus.