Parc and HACS. The feeling here is HACS are doing a better job of managing their pilots, although Parc have a higher proportion of guys on this conract.
As you are not going to be based in HNL (or Ireland for that matter) you don't need to worry about US immigration details. It is a commuting contract (to Japan) from wherever you choose to live, although the preference in the past has been for guys living in Australia or New Zealand, which is where the majority of guys still go home to.