Zero J-class on AC004 on Apr23-24
I am trying to choose the best return flight date for an upgrade NRT-YVR and I'm wondering why the J-class seems to be zeroed out on Apr23-24. I can't even bring a seatmap up for those dates as it says the class does not exist. None of the other dates are even close to selling out business class.
Does that make any sense? Why would this be?