The credits look like they outsourced it, perhaps only to one guy.
However, having worked with Japanese companies for a little bit now, there is nothing like watching someone take all the laboriously edited text and then getting their own little groove on with LogoVista or Excite.jp, and sending all credibility into the toilet with five minutes of hasty revisions. "Oh, I didn't want to bother the localization guy!" FFFUUU...