I suppose I should say that the first home video subtitles were not necessarily the same as the theatrical subs. i.e. if you look at the Italian theatrical subs for Greedo/Jabba dialogue, it doesn’t match any home video release (this is apparently a good thing, because as I understand it, the theatrical translation was pretty crap). Nevertheless, Project Threepio does have theatrical reconstructions for those crap Italian 35mm subs, for those who want to see them.

So the first Japanese home video subs may just be exclusively home video subs, I just don’t know. We don’t have any 35mm reels to confirm. But if we did, I’d preserve at least the Greedo/Jabba lines, matching font and placement as well as translation.

But for translations of the whole film, I maintain only one translation, the one that most closely matches the English dialogue. I will try to make very certain that’s the case for Japanese, though, before switching. If you or anyone else want to help confirm this, let me know.