User blog comment:Jkphantom9/OFFICIAL: Japanese Cast Announcement!/@comment-5426254-20150609184637/@comment-24993958-20150609193436

We shoiuld mentio them for the same reason we credit the existing voice cast, it’s information some people might want to know about the show. I say we wait until/if the JP RWBY will get an official sub to give them their own page though. Until then we’ll just credit them in the character bios.