Ah, oh well. My preference is the Japanese names, but I'm sure I'm in the minority.
If I knew you were in Japan I would have suggested you check your local Book Off or the like for the books. It's only 105 yen/book for the old print versions.
Wow, the older version does not end the page where I left off. I just left off there because it seemed like a good cliffhanger. What strange luck that the first page ends there in your edition.
I don't have the books on me at the moment but it looks like a pretty good translation. The English at least reads very smoothly. Keep up