Are there nonstop flights from Tokyo (NRT) to Bandar Seri Begawan (BWN)?

Yes. Royal Brunei Airlines fly this route. Flight time is about 5h 34m.

What is the fastest connection from Tokyo (NRT) to Bandar Seri Begawan (BWN)?

via Manila ≈ 6h 4m, via Taipei ≈ 6h 19m, via Hangzhou ≈ 6h 41m (estimated flying time, excluding layovers).

from 19,000 ANA miles (economy, one way, based on the published award charts).

Narita International Airport (NRT) to Brunei International Airport (BWN)・4,305 km

Nonstop flights available (1 airline). Flight time about 5h 34m. Nonstop return flights also operate.

With milesANA 19,000 miles+ (via SZX)Economy, one way, estimate. Tap a connection for miles by cabin.

11 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.