Are there nonstop flights from Tokyo (NRT) to Kathmandu (KTM)?

Yes. Nepal Airlines fly this route. Flight time is about 6h 38m.

What is the fastest connection from Tokyo (NRT) to Kathmandu (KTM)?

via Qingdao ≈ 7h 8m, via Seoul ≈ 7h 9m, via Chengdu ≈ 7h 11m (estimated flying time, excluding layovers).

from 19,000 ANA miles, from 23,000 JAL miles (economy, one way, based on the published award charts).

Narita International Airport (NRT) to Tribhuvan International Airport (KTM)・5,214 km

Nonstop flights available (1 airline). Flight time about 6h 38m. Nonstop return flights also operate.

With milesANA 19,000 miles+ (via TFU)JAL 23,000 miles+ (via ICN)Economy, one way, estimate. Tap a connection for miles by cabin.

18 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.