Are there nonstop flights from Rome (FCO) to Tokyo (HND)?

Yes. ITA Airways fly this route. Flight time is about 12h 8m.

What is the fastest connection from Rome (FCO) to Tokyo (HND)?

via Vienna ≈ 12h 40m, via Helsinki ≈ 12h 50m, via Munich ≈ 12h 52m (estimated flying time, excluding layovers).

from 31,000 ANA miles, from 40,000 JAL miles (economy, one way, based on the published award charts).

Rome–Fiumicino Leonardo da Vinci International Airport (FCO) to Tokyo Haneda International Airport (HND)・9,892 km

Nonstop flights available (1 airline). Flight time about 12h 8m. Nonstop return flights also operate.

With milesANA 31,000 miles+ (via VIE)JAL 40,000 miles+ (via HEL)Economy, one way, estimate. Tap a connection for miles by cabin.

34 one-stop options, sorted by estimated flying time. Tap one to see the airlines on each leg and booking links.

Times are estimated from distance. Check schedules, frequency and availability with the airline or a booking site.