JL used to fly high density 744 between NRT and YVR with more than 400 passengers so the fare was consistently low. However after the bankruptcy it focused on higher-yield passengers, downguaged to 777, then 767 / 787. So nowadays there are only 200 passengers +/- per flight and rarely the cheapest unless you hit promotions, which I've seen less than C$800 return to SE Asia!
