To understand the Premium Box -Final- , one must first understand the weight of the word Final . Lilith Soft is notorious for re-releasing its hits (the Taimanin series alone has dozens of SKUs). However, Kangoku Senkan was always treated differently.
Primarily Japanese (though fan-made English patches from Dark Translations have historically existed for parts of the series). Kangoku Senkan Premium Box -Final- -Anime Lilith-