Maybe, maybe not. It starts off in New York City, JFK, then connects at YVR. In fact a lot of our International flights start off somewhere else, whether it be Mexico City (JAL) or Toronto (many AC flights).
That's a large market....
Osaka International Airport is having quite the financial problems that have pushed costs to airlines through the roof....
Many flights are simply going to Chubu now. But, hubbing is important, and neither KIX or Chubu are hubs.
I'd venture to say a good 20% of people on any given flight to NRT are not staying in Japan, and NRT is an excellent hub for Air Canada's alliance within Asia.