Air Canada has a daily flight from Toronto
(YYZ) to Tokyo Narita
(NRT) in 2009. Flightnumber is AC 1. They seem to used a
Boeing 777-300ER during the summer and a Boeing 777-200LR in
winter season. The flight leaves Toronto at noon and arrives in Tokyo
at 3:05 pm local time. You won't see the sun go under durin this flight
of 13 hours and 5 minutes. But you will cross the international
dateline, so it will be the next day when you arrive in Tokyo.