Originally Posted by JALPak

Yes, FOPs are only for status. You won't get the bonus FOPs and 1.5x factor if you fly on MH. So only 4,173 FOPs on sectors flown on MH. Also note that there are business class fares that earn 70% miles/FOPs only on JL. So you won't get 6,659 FOPs if you use those fares.

If you only care about oneworld emerald, you only need to achieve JGC Premier instead.