Originally Posted by
CathayMVP
Sorry but I cannot directly answer your questions as I am not too sure but JL is allowing transit on separate tickets so that is an option to consider as long as you do not need to cross immigration for your next ticket. If you're checking in bags, make sure that JL can through check it for you so I would stay within OW (JL/MH).
Good luck!
I think OP is travelling to Japan, and not transiting through Japan.