JAL does not hire foreign pilots onto their "mainline" fleet, ie the 747-400, 777. This is the reason that the pay scales for these aircraft are not published outside of the JAL pilot group.
The only foreign pilots being hired are onto their subsiduary fleets consisting of JALWays and so on. This is 747 classic series aircraft, and I believe a few DC 10's. These pay rates could be obtained from the Contract terms with Hawaii av services or PARC or some crew leasing company of the like.
Hope this helps.