Yeah ... unfortunately Mexicana's chart didn't specify that. I figured JFK-NRT could be J award, with cheap revenue connection to HKG. It's a 4 hour flight, so not awful in Y. Looks like the OP is considering it already. Glad to be of help. Mexicana will probably change their redemption rate when they join oneworld. Unless they give crazy mileage bonuses to their flyers, 260K miles for a J return trip just can't compete with mileage rates from other alliance members. You could fly in CX F for less than that.