Thanks for that quick reply @GuyBetsy! I have a D class fare, so I will call MH and see what comes of it.
I booked the ticket from KIX with MH due to the very low fare (over $1000 cheaper than from ICN) and of course the next day BA released super low fares in PremEco and ClubWorld from ICN! Looking forward to giving them a try anyway, even with the poor reviews for the A380 seat in J.